Find me the answer to this question

Question # 1:

Nitrogen

Nitrogen has only one letter in its symbol i.e. N. All the other elements Magnesium (Mg), Chlorine (Cl) and Gold (Au) have two letters in their symbol.

Question # 2:

International Union of Pure and Applied Chemistry

IUPAC (International Union of Pure and Applied Chemistry) is a scientific organization which approves letters, names and symbols of compounds and elements.

Question # 3:

Cobalt, silver

The symbol Co is for cobalt while the symbol Ag is for Silver.

Hope this helped!

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.