How can atoms of the same element be different?

Magnesium phosphate formula

Potassium atoms contribute one eletron to metallic bonding, but calcium atoms contribute two eletrons. Explain which metal is likely to be harder

Which one of the following is a balanced equation? A. Na (s) + MgF2 → 2NaF (s) + Mg (s) B. 2Na (s) + MgF2 → 2NaF (s) + Mg (s) C. Na (s) + O2 (g) → Na2O D. Zn (s) + HCl (g) → ZnCl2 (s) + H2 (g)

If two objects have different temperatures which direction will heat move for how long

Which statement gives an example of asexual reproduction (A. a new potato plant grows from a potato (B. two worms mate and produce more worms (C. An apple seed is produced from pollinated flowers (D.

What would make bromine a group 17 element more similar to a noble gas

Use the following chemicals. ethanol, hexane, butanone, water, benzene, diethyl ether, ethyl acetate, acetone 4. Rank the solvents based on polarity, smallest to largest.

How long will it take for the concentration of xy to decrease to 12.5% of its initial concentration when the initial concentration is 0.100?

Which has a higher energy level 6d or 5s?

How far is the Earth for the moon?