i. Ca2+
ii. Fe3+
iii. Fe2+
iv. Al3+
Solutions
1. Ca²+ = 1s² 2s² 2P6 3s² 3P6
2. Fe³+ = 1s² 2s² 2P6 3s² 3p6 3d5
3. Fe²+ = 1s² 2s² 2p6 3s² 3p6 3d6
4. Al³+ = 1s² 2s² 2p6
Hypothesis Testing
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Sampling Error And Sampling Bias
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Sample And Sampling Techniques
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Sources Of Literature - Project Writing
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Research Proposal Vs Research Abstract - Educational Research
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![Two identical charges situated 20cm apart in vacuum repel each other with a force of 1.0N. Calculate the value of each other with a force of 1.0N. Calculate the value of each charge. [(14 πεo)‾¹ = 9 x 10^9 Nm²C‾²]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "Two identical charges situated 20cm apart in vacuum repel each other with a force of 1.0N. Calculate the value of each other with a force of 1.0N. Calculate the value of each charge. [(14 πεo)‾¹ = 9 x 10^9 Nm²C‾²]")