Atomic Theory & Structure

Atomic Structure

100

What are the three parts of an atom?

proton, neutron, electron

200

Which part of an atom has a negative charge?

Electrons have a negative charge.

300

Which part(s) of an atom make up most of the ATOMIC MASS?

The protons and neutrons make up most of the atomic mass.

400

The two sub-atomic particles that make up the nucleus.

What are protons & neutrons?

500

Where are the neutrons located? 

Inside the nucleus

Atomic Model

100

The atomic number in an atom is the same as...

a) mass and neutrons

b) electrons and neutrons

c) protons and electrons

c) protons and electrons

200

Neon has an atomic number of 10 and mass of 20. How many neutrons does it have? 

10

300

The center of an atom is called the

nucleus

400

Which scientist proposed that all atoms are indivisible and indestructible? 

Dalton

500

True or False?

In the currently accepted model of the atom, electrons are located inside the nucleus.

False

Atomic Number and Mass

100

The number of protons in an atom of a certain element.

atomic number

200

The sum of protons and neutrons in the nucleus of an atom.

mass number

300

What does APE stand for?

Atomic number = protons = electrons

400

What does MAN stand for?

Mass - Atomic Number = Neutrons

500

Calculate the number of protons, neutrons, and electrons of the Element Silicon.

Atomic Number: 14

Mass: 28

Protons = 14

Mass = 14

Electrons = 14

Vocabulary

100

The basic building blocks of matter (the smallest part of an element)

Atom

200

The unit of measure the atomic mass is measured in.

AMU or atomic mass unit

300

The atomic mass is based on the number of these two parts of the atom.

the protons and the neutrons

400

What is the same as the number of electrons in an atom?

a) Protons and neutrons

b) Atomic number and protons

c) Nucleus

b) Atomic number and protons

500

The “orbits” the electrons have around the nucleus are called this.

energy levels or shells

Miscellaneous

100

The number of electrons an orbital can hold on the first shell

2

200

If Oxygen has 8 protons, how many electrons does it have?

8

300

If the atomic mass of an element is 15 and it has 4 protons, how many neutrons does it have?

11

15-4 = 11

400

•True or False:

Protons and electrons are stored in the nucleus.

False: protons and neutrons

500

What do we call the electrons that are located in the outermost energy level?

valence electrons