Question

1. which subatomic particle(s) will change the identity of the element if it is gained or lost from the atom

a. proton
b. neutrons
c. electrons
d. all of the above

1. which is true of the nucleus of a cell

a. very small & dense
b. positively charged
c. contains virtually all the mass of an atom
d. all of the above

Explanation:

Question 16

The identity of an element is determined by the number of protons. Changing protons changes the element's identity. Neutrons change the isotope, electrons change charge (ion), not identity. So only protons affect element identity.

The atomic nucleus is very small, dense, positively charged (due to protons), and contains most of the atom's mass (protons + neutrons). So all options a, b, c are true.

Answer:

a. proton

Question 17