Chemistry Test

Which of these statements is false?

• Electrons have a negative charge
• Electrons are really big
• The nucleus of an atom is positively charged
• The neutron is found in the nucleus of an atom

Which subatomic particles are found INSIDE the nucleus of an atom?

• protons and neutrons
• protons and electrons
• neutrons and electrons
• molecules and atoms

Element

• a pure substance make of one kind of atom
• Substance containing atoms of two or more elements chemically combined.
• Where are electrons found?

Neutron

• the particle with no charge; located in the nucleus
• What are the building blocks of matter?
• negatively charged particle that orbits the nucleus of an atom
• What is the charge of the nucleus?

___________ + ____________ = atomic mass

• protons, neutrons
• electrons, protons
• neutrons, electrons
• protons, electrons

What is the atomic number of Floride

• 9
• 18
• 36
• 4.5

What is the atomic mass of Carbon?

• 12
• 6
• 3
• 24

The model of an atom has never changed

• False
• True

What is it?

• mixture of different elements
• element
• compound
• mixture of different compounds

What is propane (C3H8)

• compound
• mixture
• element