Atomic Structure | Chemistry

Q.

What does the 6 represent?

answer choices

Atomic mass

atomic number

chemical symbol

element name

Q. How is the number of neutrons in the nucleus of an atom calculated?

answer choices

Add the number of e- and p+ together

Subtract the number of e- from p+

Subtract the number of p+ from the mass number

Add the mass number to the number of e-

Q. What subatomic particles would you find in the nucleus of an atom?

answer choices

Protons only

Protons and Neutrons

Neutrons and Electrons

Protons and Electrons

Q. Which subatomic particles contribute the most to the mass of an atom?

answer choices

Protons, Neutrons, Electrons

Protons only

Protons and Electrons

Protons and Neutrons

Q. If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

answer choices

12 neutrons

12 electrons

12 protons

24 protons and neutrons

Q.

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

answer choices

20

10

35

25

Q.

How many electrons does this atom have?

answer choices

2

4

6

10

Q. The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is _____.

answer choices

9

10

19

28

Q. An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

answer choices

11

5

6

16

Q. Where is most of the mass in an atom located?

answer choices

in the nucleus

in the protons

in the neutrons

in the electrons

Q. An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

answer choices

15

31

16

47

Q. What is the atomic number of the atom pictured?

answer choices

9

10

18

19

Q.

Which of the following determines the identity of an element?

answer choices

number of protons

atomic mass

number of neutrons

number of shells