Question

.Which of the following atoms in its ground state has the greatest number of valence electrons?

A. Al.
B. P.
C. S.
D. Si.
2.The property of the element that varies in relation to their atomic masses is

A. periodicity.
B. periodic table.
C. periodic law.
D. none of the above
3.The chemically unreactive group of elements is called the

A. alkali metals.
B. alkaline earth metals.
C. halogens.
D. noble gases.
4.Which of the following elements is a d-block element?

A. Calcium.
B. Iron.
C. Lithium.
D. Silicon.
5.The type of bond formed when two elements 17X and 19Y combine together is

A. covalent.
B. coordinate.
C. electrovalent.
D. hydrogen.

Answer 1

Answer:

1 answer is option B

2answeris C

3 answer is B

4 answer is B

Answer 2

Explanation:

5. covalent bond

3.alkali metals