Science

Question 1

1The scientist who arranged elements in the first periodic table is

Medium

A. Dmitri Mendeleev B. Charles Darwin C. Isaac Newton D. Albert Einstein

Question 2

2The atomic number tells the number of protons.

Easy

A. True B. False

Question 3

3Electrons are found in the nucleus.

Easy

A. True B. False

Question 4

4Atoms of the same element with different numbers of neutrons are ___.

Hard

Your answer (fill in the blank)

Question 5

5Neutrons have a negative charge.

Easy

A. True B. False

Question 6

6The maximum number of electrons in the first shell is

Medium

A. 18 B. 1 C. 8 D. 2

Question 7

7The electron arrangement of an atom with 6 electrons (carbon) is 2, ___.

Medium

Your answer (fill in the blank)

Question 8

8The mass number is the number of

Medium

A. electrons only B. protons plus neutrons C. protons only D. shells

Question 9

9Noble gases are unreactive because

Hard

A. they are metals B. they have full outer shells C. they have no electrons D. they are heavy

Question 10

10An atom of sodium has 11 protons and 12 neutrons. Its mass number is

Medium

A. 11 B. 23 C. 1 D. 12