Atomic Theory and Structure

Give the mass number of an americium atom with 148 neutrons ___________

The three smaller components that make up atoms are...

• neutrons, protons, and ions

• neutrons, electrons, and protons

• protons, ions, and electons

• electrons, isotopes, and ions

If an atom has six positively charged subatomic particles, which of the following must it also have in order to become a neutral atom?

• 12 protons

• 6 neutrons

• 3 electrons

• 6 electrons

Which of the following lists the two subatomic particles that contribute the most to the mass of an atom?

• protons and electrons

• protons and neutrons

• neutrons and electrons

• electrons and ions

Protons and neutrons are found in the center of the atom called the:

• nucleus

• neutron

• shell

• cell

Tags

NGSS.MS-PS1-1

The subatomic particles are called:

• protons, nucleus and electrons

• protons, electrons and neutrons

• protons, positives and negatives

• cloud, shell and quarks

All matter is made of _____.

• light

• energy

• cells

• atoms

Tags

NGSS.MS-PS1-1

Which of the following two particles are found together inside the nucleus of an atom?

• photons and ions

• neutrons and electrons

• protons and neutrons

• electrons and protons

A neutral atom has an equal number of positive and negative charges. If a neutral Flourine atom has 9 protons and 10 neutrons, how many electrons will it have?

• 10

• 9

• 8

• 7

If an atom has 17 protons, 18 neutrons, and 17 electrons, what is the mass of this atom?

• 17

• 18

• 35

• 52