3-1 Practice Quiz

A scientist picks up a sample of an element. She thinks it might be a metal. Which of the following properties would support her conclusion? Select all correct answers.

• the element is shiny

• the element is dull

• the element partially conducts electricity

• the element is a good conductor of electricity

• the element is very brittle

Which of the following statements provides correct evidence that atoms have electrical charges associated with with them?

• an element is made of a certain kind of atom

• the nucleus of an atom attracts positively charged particles

• cathode rays are attracted to positively charged atoms

• x-rays produce images of bones

During the gold foil experiment, the atom was discovered to ______.

• have positive and negative charges

• have a positive nucleus

• have electrons in energy level orbits

• be a solid sphere

During the gold foil experiment most of the particles passed through the gold foil. This implies that most of the space in the atoms in the foil are take up by ____.

• the nucleus

• the electrons

• nothing

Strontium-88 has an atomic number of ________.

• 37

• 38

• 50

• 87.8

• 88

Strontium-88 has a mass number of ________.

• 37

• 38

• 50

• 87.8

• 88

Strontium-88 has ________ protons.

• 37

• 38

• 50

• 87.8

• 88

Strontium-88 has ________ neutrons.

• 37

• 38

• 50

• 87.8

• 88

Strontium-88 has ________ electrons.

• 37

• 38

• 50

• 87.8

• 88

Some atoms of different elements may have _______ electron dot notation.

• the same

• different

• valence

• inner-shell