A. How many electrons are in a neutral atom of lithium?
B.
How many neutrons are in an atom of Mg-25?
C.
What is the mass number of an atom with 5 protons and 7 neutrons?
D.
When an atom is charged, it is called an ion. How many electrons are in O2-?
E.
How many electrons are in Mg2+?

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

Which element is least likely to undergo a chemical reaction