Intro to Chemistry

Which sub-atomic particle is responsible for reactions between most atoms?

• Proton

• Neutron

• Electron

• None of these

a charged atom

• neutral

• isotope

• ion

• nucleus

What does an elements ATOMIC NUMBER represent?

• number of atoms in its nucleus

• number of protons in its nucleus

What is the atomic symbol for Carbon?

• Ca

• C

• Cb

• Cn

An atom's nucleus contains what particles?

• protons and positrons

• protons and neutrinos

• quarks and quasars

• protons and neutrons

This element has an atomic weight of......

• 54

• 25

neutrons

• no charge, shells

• positive charge, nucleus

• no charge, nucleus

• negative charge, shells

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

What two elements make up water?

• Helium and oxygen
• Hydrogen and oxygen
• helium and carbon
• oxygen and carbon