Chemistry

What is the atomic number for an element with three protons?

• 2
• 1
• 3
• 6

What is the atomic symbol for sodium?

• Na
• So
• NaCl
• S

True or False? Neutrons have a negative charge

• True
• False

An atom's mass number equals the number of...

• protons plus the number of electrons
• protons plus the number of neutrons
• protons
• neutrons

Which statement about the atomic nucleus is correct?

• The nucleus is made of protons and neutrons and has a negative charge
• The nucleus is made of protons and neutrons and has a positive charge
• The nucleus is made of electrons and has a positive charge
• The nucleus is made of electrons and has a negative charge

Tags

NGSS.MS-PS1-1

Which statement best describes an electron?

• Smaller mass than a proton and a negative charge
• Smaller mass than a proton and a positive charge
• Greater mass than a proton and a negative charge
• Greater mass than a proton and a positive charge

A particle that moves around the nucleus is a(n)...

• Proton
• Neutron
• Electron
• Quark

What does the nucleus consist of?

• Protons + Electrons
• Neutrons + Electrons
• Atoms
• Protons + Neutrons

Matter always has mass.

• true
• false

Tags

NGSS.HS-PS1-7

What is the smallest?

• worm
• molecule
• galaxy
• atom