Atoms

The atomic mass is the

• number of protons and neutrons inside the nucleus

• number or electrons or protons

• number of protons, neutrons and electrons

All matter is made of _________.

• energy 
• atoms 
• electrons 
• compounds 

If an atom has 3 electrons, how many protons does it have?

• 1
• 2
• 4
• 3

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

What is at the center of every atom?

• An electron
• A compound
• A molecule
• A nucleus

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

• electrons
• neutrons
• protons
• protons and neutrons

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RN

A charged atom

• Ion

• Isotope

• Proton

• Electron

Atoms of the same element that have different numbers of neutrons

• Ion

• Isotope

• Proton

• Electron

Which is an electron?

• A
• B
• C