Recent Quotes
My Watchlist
Indicators
Markets
Stocks
ETFs
Tools
Overview
News
Currencies
International
Treasuries

American Century One Choice 2025 Portfolio R Class (MF: ARWRX )

13.95 +0.01 (+0.07%)
Daily Price Updated: 4:00 PM EDT, May 17, 2024 Add to My Watchlist
Quote
Overview Detailed Quote Charting Historical Prices
News
All News News Headlines Press Releases
Research
Quarterly Reports Insider Filings Other Filings

Historical Prices

Month:
Year:
Range:
Date Open High Low Close Volume Change (%)
Dec 30, 2005 11.20 11.20 11.20 11.20 0 -0.04(-0.36%)
Dec 29, 2005 11.24 11.24 11.24 11.24 0 +0.00(+0.00%)
Dec 28, 2005 11.24 11.24 11.24 11.24 0 -0.05(-0.44%)
Dec 23, 2005 11.29 11.29 11.29 11.29 0 +0.02(+0.18%)
Dec 22, 2005 11.24 11.27 11.27 11.27 0 +0.03(+0.27%)
Dec 21, 2005 11.21 11.24 11.24 11.24 0 +0.03(+0.27%)
Dec 20, 2005 11.21 11.21 11.21 11.21 0 +0.00(+0.00%)
Dec 19, 2005 11.21 11.21 11.21 11.21 0 -0.05(-0.44%)
Dec 16, 2005 11.26 11.26 11.26 11.26 0 -0.27(-2.34%)
Dec 15, 2005 11.53 11.53 11.53 11.53 0 -0.03(-0.26%)
Dec 14, 2005 11.56 11.56 11.56 11.56 0 +0.04(+0.35%)
Dec 13, 2005 11.52 11.52 11.52 11.52 0 +0.03(+0.26%)
Dec 12, 2005 11.49 11.49 11.49 11.49 0 +0.02(+0.17%)
Dec 09, 2005 11.47 11.47 11.47 11.47 0 +0.01(+0.09%)
Dec 08, 2005 11.46 11.46 11.46 11.46 0 +0.01(+0.09%)
Dec 07, 2005 11.45 11.45 11.45 11.45 0 -0.04(-0.35%)
Dec 06, 2005 11.49 11.49 11.49 11.49 0 +0.02(+0.17%)
Dec 05, 2005 11.47 11.47 11.47 11.47 0 -0.02(-0.17%)
Dec 02, 2005 11.49 11.49 11.49 11.49 0 +0.02(+0.17%)
Dec 01, 2005 11.47 11.47 11.47 11.47 0 +0.10(+0.88%)
Nov 30, 2005 11.37 11.37 11.37 11.37 0 -0.03(-0.26%)
Nov 29, 2005 11.40 11.40 11.40 11.40 0 +0.00(+0.00%)
Nov 28, 2005 11.40 11.40 11.40 11.40 0 -0.06(-0.52%)
Nov 25, 2005 11.46 11.46 11.46 11.46 0 +0.01(+0.09%)
Nov 23, 2005 11.45 11.45 11.45 11.45 0 +0.03(+0.26%)
Nov 22, 2005 11.42 11.42 11.42 11.42 0 +0.04(+0.35%)
Nov 21, 2005 11.38 11.38 11.38 11.38 0 +0.04(+0.35%)
Nov 18, 2005 11.34 11.34 11.34 11.34 0 +0.03(+0.27%)
Nov 17, 2005 11.31 11.31 11.31 11.31 0 +0.10(+0.89%)
Nov 16, 2005 11.21 11.21 11.21 11.21 0 +0.01(+0.09%)
Nov 15, 2005 11.20 11.20 11.20 11.20 0 -0.03(-0.27%)
Nov 14, 2005 11.23 11.23 11.23 11.23 0 -0.01(-0.09%)
Nov 11, 2005 11.24 11.24 11.24 11.24 0 +0.04(+0.36%)
Nov 10, 2005 11.20 11.20 11.20 11.20 0 +0.06(+0.54%)
Nov 09, 2005 11.14 11.14 11.14 11.14 0 +0.00(+0.00%)
Nov 08, 2005 11.14 11.14 11.14 11.14 0 -0.01(-0.09%)
Nov 07, 2005 11.15 11.15 11.15 11.15 0 +0.03(+0.27%)
Nov 04, 2005 11.12 11.12 11.12 11.12 0 -0.01(-0.09%)
Nov 03, 2005 11.13 11.13 11.13 11.13 0 +0.01(+0.09%)
Nov 02, 2005 11.12 11.12 11.12 11.12 0 +0.08(+0.72%)
Nov 01, 2005 11.04 11.04 11.04 11.04 0 +0.00(+0.00%)
Oct 31, 2005 11.04 11.04 11.04 11.04 0 +0.07(+0.64%)
Oct 28, 2005 10.97 10.97 10.97 10.97 0 +0.11(+1.01%)
Oct 27, 2005 10.86 10.86 10.86 10.86 0 -0.08(-0.73%)
Oct 26, 2005 10.94 10.94 10.94 10.94 0 -0.04(-0.36%)
Oct 25, 2005 10.98 10.98 10.98 10.98 0 -0.03(-0.27%)
Oct 24, 2005 11.01 11.01 11.01 11.01 0 +0.12(+1.10%)
Oct 21, 2005 10.89 10.89 10.89 10.89 0 +0.04(+0.37%)
Oct 20, 2005 10.85 10.85 10.85 10.85 0 -0.10(-0.91%)
Oct 19, 2005 10.95 10.95 10.95 10.95 0 +0.07(+0.64%)
Oct 18, 2005 10.88 10.88 10.88 10.88 0 -0.07(-0.64%)
Oct 17, 2005 10.95 10.95 10.95 10.95 0 +0.02(+0.18%)
Oct 14, 2005 10.93 10.93 10.93 10.93 0 +0.07(+0.64%)
Oct 13, 2005 10.86 10.86 10.86 10.86 0 -0.03(-0.28%)
Oct 12, 2005 10.89 10.89 10.89 10.89 0 -0.07(-0.64%)
Oct 11, 2005 10.96 10.96 10.96 10.96 0 -0.02(-0.18%)
Oct 10, 2005 10.98 10.98 10.98 10.98 0 -0.04(-0.36%)
Oct 07, 2005 11.02 11.02 11.02 11.02 0 +0.02(+0.18%)
Oct 06, 2005 11.00 11.00 11.00 11.00 0 -0.05(-0.45%)
Oct 05, 2005 11.05 11.05 11.05 11.05 0 -0.11(-0.99%)
Oct 04, 2005 11.16 11.16 11.16 11.16 0 -0.06(-0.53%)
Oct 03, 2005 11.22 11.22 11.22 11.22 0 -0.01(-0.09%)
Sep 30, 2005 11.23 11.23 11.23 11.23 0 +0.02(+0.18%)
Sep 29, 2005 11.21 11.21 11.21 11.21 0 +0.07(+0.63%)
Sep 28, 2005 11.14 11.14 11.14 11.14 0 +0.02(+0.18%)
Sep 27, 2005 11.12 11.12 11.12 11.12 0 -0.02(-0.18%)
Sep 26, 2005 11.14 11.14 11.14 11.14 0 +0.03(+0.27%)
Sep 23, 2005 11.11 11.11 11.11 11.11 0 +0.00(+0.00%)
Sep 22, 2005 11.11 11.11 11.11 11.11 0 +0.02(+0.18%)
Sep 21, 2005 11.09 11.09 11.09 11.09 0 -0.07(-0.63%)
Sep 20, 2005 11.16 11.16 11.16 11.16 0 -0.09(-0.80%)
Sep 19, 2005 11.25 11.25 11.25 11.25 0 +0.00(+0.00%)
Sep 16, 2005 11.25 11.25 11.25 11.25 0 +0.05(+0.45%)
Sep 15, 2005 11.20 11.20 11.20 11.20 0 +0.00(+0.00%)
Sep 14, 2005 11.20 11.20 11.20 11.20 0 -0.03(-0.27%)
Sep 13, 2005 11.23 11.23 11.23 11.23 0 -0.05(-0.44%)
Sep 12, 2005 11.28 11.28 11.28 11.28 0 +0.00(+0.00%)
Sep 09, 2005 11.28 11.28 11.28 11.28 0 +0.06(+0.53%)
Sep 08, 2005 11.22 11.22 11.22 11.22 0 -0.03(-0.27%)
Sep 07, 2005 11.25 11.25 11.25 11.25 0 +0.00(+0.00%)
Sep 06, 2005 11.25 11.25 11.25 11.25 0 +0.09(+0.81%)
Sep 02, 2005 11.16 11.16 11.16 11.16 0 -0.02(-0.18%)
Sep 01, 2005 11.18 11.18 11.18 11.18 0 +0.04(+0.36%)
Aug 31, 2005 11.14 11.14 11.14 11.14 0 +0.10(+0.91%)
Aug 30, 2005 11.04 11.04 11.04 11.04 0 -0.01(-0.09%)
Aug 29, 2005 11.05 11.05 11.05 11.05 0 +0.04(+0.36%)
Aug 26, 2005 11.01 11.01 11.01 11.01 0 -0.06(-0.54%)
Aug 25, 2005 11.07 11.07 11.07 11.07 0 +0.02(+0.18%)
Aug 24, 2005 11.05 11.05 11.05 11.05 0 -0.04(-0.36%)
Aug 23, 2005 11.09 11.09 11.09 11.09 0 -0.03(-0.27%)
Aug 22, 2005 11.12 11.12 11.12 11.12 0 +0.03(+0.27%)
Aug 19, 2005 11.09 11.09 11.09 11.09 0 +0.01(+0.09%)
Aug 18, 2005 11.08 11.08 11.08 11.08 0 -0.02(-0.18%)
Aug 17, 2005 11.10 11.10 11.10 11.10 0 -0.02(-0.18%)
Aug 16, 2005 11.12 11.12 11.12 11.12 0 -0.06(-0.54%)
Aug 15, 2005 11.18 11.18 11.18 11.18 0 +0.01(+0.09%)
Aug 12, 2005 11.17 11.17 11.17 11.17 0 -0.03(-0.27%)
Aug 11, 2005 11.20 11.20 11.20 11.20 0 +0.06(+0.54%)
Aug 10, 2005 11.14 11.14 11.14 11.14 0 +0.02(+0.18%)
Aug 09, 2005 11.12 11.12 11.12 11.12 0 +0.04(+0.36%)
Aug 08, 2005 11.08 11.08 11.08 11.08 0 -0.03(-0.27%)
Aug 05, 2005 11.11 11.11 11.11 11.11 0 -0.09(-0.80%)
Aug 04, 2005 11.20 11.20 11.20 11.20 0 -0.06(-0.53%)
Aug 03, 2005 11.26 11.26 11.26 11.26 0 +0.01(+0.09%)
Aug 02, 2005 11.25 11.25 11.25 11.25 0 +0.05(+0.45%)
Aug 01, 2005 11.20 11.20 11.20 11.20 0 +0.02(+0.18%)
Jul 29, 2005 11.18 11.18 11.18 11.18 0 -0.04(-0.36%)
Jul 28, 2005 11.22 11.22 11.22 11.22 0 +0.07(+0.63%)
Jul 27, 2005 11.15 11.15 11.15 11.15 0 +0.03(+0.27%)
Jul 26, 2005 11.12 11.12 11.12 11.12 0 +0.02(+0.18%)
Jul 25, 2005 11.10 11.10 11.10 11.10 0 -0.03(-0.27%)
Jul 22, 2005 11.13 11.13 11.13 11.13 0 +0.04(+0.36%)
Jul 21, 2005 11.09 11.09 11.09 11.09 0 -0.05(-0.45%)
Jul 20, 2005 11.14 11.14 11.14 11.14 0 +0.05(+0.45%)
Jul 19, 2005 11.09 11.09 11.09 11.09 0 +0.02(+0.18%)
Jul 18, 2005 11.07 11.07 11.07 11.07 0 +0.00(+0.00%)
Jul 15, 2005 11.07 11.07 11.07 11.07 0 +0.01(+0.09%)
Jul 14, 2005 11.06 11.06 11.06 11.06 0 +0.00(+0.00%)
Jul 13, 2005 11.06 11.06 11.06 11.06 0 -0.02(-0.18%)
Jul 12, 2005 11.08 11.08 11.08 11.08 0 +0.02(+0.18%)
Jul 11, 2005 11.06 11.06 11.06 11.06 0 +0.06(+0.55%)
Jul 08, 2005 11.00 11.00 11.00 11.00 0 +0.06(+0.55%)
Jul 07, 2005 10.94 10.94 10.94 10.94 0 +0.03(+0.27%)
Jul 06, 2005 10.91 10.91 10.91 10.91 0 -0.03(-0.27%)
Jul 05, 2005 10.94 10.94 10.94 10.94 0 +0.05(+0.46%)
Jul 01, 2005 10.89 10.89 10.89 10.89 0 +0.00(+0.00%)
Jun 30, 2005 10.89 10.89 10.89 10.89 0 -0.02(-0.18%)
Jun 29, 2005 10.91 10.91 10.91 10.91 0 +0.00(+0.00%)
Jun 28, 2005 10.91 10.91 10.91 10.91 0 +0.06(+0.55%)
Jun 27, 2005 10.85 10.85 10.85 10.85 0 +0.00(+0.00%)
Jun 24, 2005 10.85 10.85 10.85 10.85 0 -0.04(-0.37%)
Jun 23, 2005 10.89 10.89 10.89 10.89 0 -0.08(-0.73%)
Jun 22, 2005 10.97 10.97 10.97 10.97 0 +0.01(+0.09%)
Jun 21, 2005 10.96 10.96 10.96 10.96 0 +0.00(+0.00%)
Jun 20, 2005 10.96 10.96 10.96 10.96 0 -0.01(-0.09%)
Jun 17, 2005 10.97 10.97 10.97 10.97 0 +0.04(+0.37%)
Jun 16, 2005 10.93 10.93 10.93 10.93 0 +0.04(+0.37%)
Jun 15, 2005 10.89 10.89 10.89 10.89 0 +0.02(+0.18%)
Jun 14, 2005 10.87 10.87 10.87 10.87 0 +0.01(+0.09%)
Jun 13, 2005 10.86 10.86 10.86 10.86 0 +0.02(+0.18%)
Jun 10, 2005 10.84 10.84 10.84 10.84 0 -0.02(-0.18%)
Jun 09, 2005 10.86 10.86 10.86 10.86 0 +0.03(+0.28%)
Jun 08, 2005 10.83 10.83 10.83 10.83 0 -0.03(-0.28%)
Jun 07, 2005 10.86 10.86 10.86 10.86 0 +0.02(+0.18%)
Jun 06, 2005 10.84 10.84 10.84 10.84 0 +0.02(+0.18%)
Jun 03, 2005 10.82 10.82 10.82 10.82 0 -0.04(-0.37%)
Jun 02, 2005 10.86 10.86 10.86 10.86 0 +0.02(+0.18%)
Jun 01, 2005 10.84 10.84 10.84 10.84 0 +0.07(+0.65%)
May 31, 2005 10.77 10.77 10.77 10.77 0 -0.02(-0.19%)
May 27, 2005 10.79 10.79 10.79 10.79 0 +0.02(+0.19%)
May 26, 2005 10.77 10.77 10.77 10.77 0 +0.04(+0.37%)
May 25, 2005 10.73 10.73 10.73 10.73 0 -0.04(-0.37%)
May 24, 2005 10.77 10.77 10.77 10.77 0 +0.00(+0.00%)
May 23, 2005 10.77 10.77 10.77 10.77 0 +0.04(+0.37%)
May 20, 2005 10.73 10.73 10.73 10.73 0 -0.01(-0.09%)
May 19, 2005 10.74 10.74 10.74 10.74 0 +0.13(+1.23%)
May 17, 2005 10.61 10.61 10.61 10.61 0 +0.03(+0.28%)
May 16, 2005 10.58 10.58 10.58 10.58 0 +0.06(+0.57%)
May 13, 2005 10.52 10.52 10.52 10.52 0 -0.04(-0.38%)
May 12, 2005 10.56 10.56 10.56 10.56 0 -0.07(-0.66%)
May 11, 2005 10.63 10.63 10.63 10.63 0 +0.01(+0.09%)
May 10, 2005 10.62 10.62 10.62 10.62 0 -0.05(-0.47%)
May 09, 2005 10.67 10.67 10.67 10.67 0 +0.04(+0.38%)
May 06, 2005 10.63 10.63 10.63 10.63 0 -0.02(-0.19%)
May 05, 2005 10.65 10.65 10.65 10.65 0 +0.00(+0.00%)
May 04, 2005 10.65 10.65 10.65 10.65 0 +0.10(+0.95%)
May 03, 2005 10.55 10.55 10.55 10.55 0 -0.01(-0.09%)
May 02, 2005 10.56 10.56 10.56 10.56 0 +0.03(+0.28%)
Apr 29, 2005 10.53 10.53 10.53 10.53 0 +0.05(+0.48%)
Apr 28, 2005 10.48 10.48 10.48 10.48 0 -0.06(-0.57%)
Apr 27, 2005 10.54 10.54 10.54 10.54 0 +0.01(+0.09%)
Apr 26, 2005 10.53 10.53 10.53 10.53 0 -0.06(-0.57%)
Apr 25, 2005 10.59 10.59 10.59 10.59 0 +0.06(+0.57%)
Apr 22, 2005 10.53 10.53 10.53 10.53 0 -0.04(-0.38%)
Apr 21, 2005 10.57 10.57 10.57 10.57 0 +0.11(+1.05%)
Apr 20, 2005 10.46 10.46 10.46 10.46 0 -0.09(-0.85%)
Apr 19, 2005 10.55 10.55 10.55 10.55 0 +0.07(+0.67%)
Apr 18, 2005 10.48 10.48 10.48 10.48 0 +0.01(+0.10%)
Apr 15, 2005 10.47 10.47 10.47 10.47 0 -0.11(-1.04%)
Apr 14, 2005 10.58 10.58 10.58 10.58 0 -0.08(-0.75%)
Apr 13, 2005 10.66 10.66 10.66 10.66 0 -0.07(-0.65%)
Apr 12, 2005 10.73 10.73 10.73 10.73 0 +0.05(+0.47%)
Apr 11, 2005 10.68 10.68 10.68 10.68 0 -0.01(-0.09%)
Apr 08, 2005 10.69 10.69 10.69 10.69 0 -0.05(-0.47%)
Apr 07, 2005 10.74 10.74 10.74 10.74 0 +0.03(+0.28%)
Apr 06, 2005 10.71 10.71 10.71 10.71 0 +0.03(+0.28%)
Apr 05, 2005 10.68 10.68 10.68 10.68 0 +0.03(+0.28%)
Apr 04, 2005 10.65 10.65 10.65 10.65 0 +0.00(+0.00%)
Apr 01, 2005 10.65 10.65 10.65 10.65 0 -0.02(-0.19%)
Mar 31, 2005 10.67 10.67 10.67 10.67 0 +0.01(+0.09%)
Mar 30, 2005 10.66 10.66 10.66 10.66 0 +0.09(+0.85%)
Mar 29, 2005 10.57 10.57 10.57 10.57 0 -0.05(-0.47%)
Mar 28, 2005 10.62 10.62 10.62 10.62 0 +0.00(+0.00%)
Mar 24, 2005 10.62 10.62 10.62 10.62 0 +0.00(+0.00%)
Mar 23, 2005 10.62 10.62 10.62 10.62 0 -0.04(-0.38%)
Mar 22, 2005 10.66 10.66 10.66 10.66 0 -0.07(-0.65%)
Mar 21, 2005 10.73 10.73 10.73 10.73 0 -0.03(-0.28%)
Mar 18, 2005 10.76 10.76 10.76 10.76 0 -0.02(-0.19%)
Mar 17, 2005 10.78 10.78 10.78 10.78 0 +0.02(+0.19%)
Mar 16, 2005 10.76 10.76 10.76 10.76 0 -0.10(-0.92%)
Mar 15, 2005 10.86 10.86 10.86 10.86 0 +0.03(+0.28%)
Mar 14, 2005 10.83 10.83 10.83 10.83 0 +0.00(+0.00%)
Mar 11, 2005 10.83 10.83 10.83 10.83 0 -0.04(-0.37%)
Mar 10, 2005 10.87 10.87 10.87 10.87 0 +0.00(+0.00%)
Mar 09, 2005 10.87 10.87 10.87 10.87 0 -0.09(-0.82%)
Mar 08, 2005 10.96 10.96 10.96 10.96 0 -0.04(-0.36%)
Mar 07, 2005 11.00 11.00 11.00 11.00 0 +0.02(+0.18%)
Mar 04, 2005 10.98 10.98 10.98 10.98 0 +0.09(+0.83%)
Mar 03, 2005 10.89 10.89 10.89 10.89 0 +0.01(+0.09%)
Mar 02, 2005 10.88 10.88 10.88 10.88 0 -0.02(-0.18%)
Mar 01, 2005 10.90 10.90 10.90 10.90 0 +0.04(+0.37%)
Feb 28, 2005 10.86 10.86 10.86 10.86 0 -0.03(-0.28%)
Feb 25, 2005 10.89 10.89 10.89 10.89 0 +0.09(+0.83%)
Feb 24, 2005 10.80 10.80 10.80 10.80 0 +0.04(+0.37%)
Feb 23, 2005 10.76 10.76 10.76 10.76 0 +0.03(+0.28%)
Feb 22, 2005 10.73 10.73 10.73 10.73 0 -0.09(-0.83%)
Feb 18, 2005 10.82 10.82 10.82 10.82 0 -0.01(-0.09%)
Feb 17, 2005 10.83 10.83 10.83 10.83 0 -0.04(-0.37%)
Feb 16, 2005 10.87 10.87 10.87 10.87 0 +0.00(+0.00%)
Feb 15, 2005 10.87 10.87 10.87 10.87 0 +0.03(+0.28%)
Feb 14, 2005 10.84 10.84 10.84 10.84 0 +0.02(+0.18%)
Feb 11, 2005 10.82 10.82 10.82 10.82 0 +0.06(+0.56%)
Feb 10, 2005 10.76 10.76 10.76 10.76 0 +0.02(+0.19%)
Feb 09, 2005 10.74 10.74 10.74 10.74 0 -0.05(-0.46%)
Feb 08, 2005 10.79 10.79 10.79 10.79 0 -0.01(-0.09%)
Feb 07, 2005 10.80 10.80 10.80 10.80 0 +0.00(+0.00%)
Feb 04, 2005 10.80 10.80 10.80 10.80 0 +0.09(+0.84%)
Feb 03, 2005 10.71 10.71 10.71 10.71 0 -0.02(-0.19%)
Feb 02, 2005 10.73 10.73 10.73 10.73 0 +0.02(+0.19%)
Feb 01, 2005 10.71 10.71 10.71 10.71 0 +0.06(+0.56%)
Jan 31, 2005 10.65 10.65 10.65 10.65 0 +0.06(+0.57%)
Jan 28, 2005 10.59 10.59 10.59 10.59 0 +0.00(+0.00%)
Jan 27, 2005 10.59 10.59 10.59 10.59 0 -0.01(-0.09%)
Jan 26, 2005 10.60 10.60 10.60 10.60 0 +0.06(+0.57%)
Jan 25, 2005 10.54 10.54 10.54 10.54 0 -0.01(-0.09%)
Jan 24, 2005 10.55 10.55 10.55 10.55 0 -0.02(-0.19%)
Jan 21, 2005 10.57 10.57 10.57 10.57 0 -0.02(-0.19%)
Jan 20, 2005 10.59 10.59 10.59 10.59 0 -0.06(-0.56%)
Jan 19, 2005 10.65 10.65 10.65 10.65 0 -0.04(-0.37%)
Jan 18, 2005 10.69 10.69 10.69 10.69 0 +0.06(+0.56%)
Jan 14, 2005 10.63 10.63 10.63 10.63 0 +0.04(+0.38%)
Jan 13, 2005 10.59 10.59 10.59 10.59 0 -0.02(-0.19%)
Jan 12, 2005 10.61 10.61 10.61 10.61 0 +0.02(+0.19%)
Jan 11, 2005 10.59 10.59 10.59 10.59 0 -0.03(-0.28%)
Jan 10, 2005 10.62 10.62 10.62 10.62 0 +0.02(+0.19%)
Jan 07, 2005 10.60 10.60 10.60 10.60 0 -0.01(-0.09%)
Jan 06, 2005 10.61 10.61 10.61 10.61 0 +0.02(+0.19%)
Jan 05, 2005 10.59 10.59 10.59 10.59 0 -0.06(-0.56%)
Jan 04, 2005 10.65 10.65 10.65 10.65 0 -0.11(-1.02%)
Data & News supplied by www.cloudquote.io
Stock quotes supplied by Barchart
Quotes delayed at least 20 minutes.
By accessing this page, you agree to the following
Privacy Policy and Terms and Conditions.