Chemistry Pre-Test

Oxygen’s atomic number is 8. This means that an oxygen atom must have

• 8 electrons
• 8 protons
• 8 neutrons
• a mass number of 8

Tags

NGSS.MS-PS1-1

Which two particles make up the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Molecules and Compounds
• Neutrons and Electrons

Tags

NGSS.HS-PS1-8

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

Tags

NGSS.MS-PS1-1

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

Tags

NGSS.MS-PS1-1

The negatively charged particles of an atom are the ______.

• electrons
• protons
• neutrons
• protons & neutrons

Tags

NGSS.MS-PS1-1

How many electrons are in the element, Oxygen, with the atomic number of 8?

• 7
• 10
• 8
• 9

Tags

NGSS.MS-PS1-1

Which two particles make up the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Molecules and Compounds
• Neutrons and Electrons

What are the three particles that make up the atom?

• protons, neutrons and isotopes

• protons, negatives and electrons

• neutrons, isotopes and electrons

• protons, neutrons and electrons

What are valence electrons?

• electrons on the first orbital always
• nucleus
• the outermost shell
• the number of electrons on the outermost orbital

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An element with a mass number of 10 and an atomic number of 6 has how many neutrons?

• 6

• 8

• 4

• 10