Unit Test — Unit test Answers

Which statement describes a property of a proton?

is found outside the nucleus

has a positive charge

has less mass than an electron

is repelled by electrons

This is how sodium appears in the periodic table.

number of neutrons.

chemical symbol

atomic mass

combined number of electrons and protons.

Scientists in a lab are working with two different samples of the element mercury. They know that the different samples are different isotopes.

the atomic number

the electric charge

the element name

the mass number

What are the two parts of an atom?

the nucleus and the proton cloud

the neutron and the electron cloud

the neutron and the proton cloud

the nucleus and the electron cloud

Which properties make a metal a good material to use for electrical wires?

malleability and reactivity

conductivity and ductility

ductility and malleability

reactivity and conductivity

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