Question

Complete the following statement: $(4.2,4.5)$

a. The number of protons and neutrons in an atom is also the ________ number.

b. The elements in Group $7A\left(17\right)$are called the ________.

c. Elements that are shiny and conduct heat are called ________.

Short answer

a. Mass.

b. Halogens.

c. Metals.

Step-by-step solution

Part (a) step 1: Given Information 

We need to complete the number of protons and neutrons in an atom is also the ________ number.

Part (a) step 2: Explanation

Now,

The number of protons and neutrons in an atom is called themassnumber.

Part (b) step 1: Given Information 

We need to complete the elements in Group $7A\left(17\right)$ are called the Metals.

Part (b) step 2: Explanation 

Here,

The elements of the Group $7A\left(17\right)$ are called halogens.

Part (c) step 1: Given Information 

We need to complete elements that are shiny and conduct heat are called ________.

Part (c) step 2: Explanation 

Here,

The elements that are shiny and conduct heat are called ________.