Me (75 points)

question 1 (1 point) what is found in the nucleus of an atom?

options: a. electrons b. protons and electrons c. neutrons and electrons d. neutrons and protons

question 2 (1 point) what is the basic unit of matter?

options: a. cell b. energy c. electron d. atom

question 3 (1 point) on the period table, the rows are called

options: a. columns b. groups c. periods d. sections

question 4 (1 point) the atomic number is the number of in an atom.

options: a. groups b. electrons c. protons d. neutrons

question 5 (1 point) columns on the periodic table are called

options: a. sections b. rows c. groups d. periods