U2L1 - Lecture Presentation - Matter

Multiple Choice

Why are atoms important?

• They make up some types of organisms.

• They are the building blocks of all matter.

• They are found in living things, but not in nonliving things.

Fill in the Blanks

The particles located in the nucleus that have a positive charge are called

Multiple Select

Which are subatomic particles found in atoms?

Multiple select question.

• electrons

• ions

• isotopes

• neutrons

• protons

Fill in the Blanks

A(n)

is a pure substance that cannot be broken down into other substances by physical or chemical means.

Multiple Select

Which explain ways that the periodic table of elements is useful?

Multiple select question.

• It allows the properties of undiscovered elements to predicted.

• It organizes information about known elements.

• It includes names of all possible compounds on Earth.

• ​It allows the properties of undiscovered

elements to be predicted.

• It organizes information about known

elements.

Fill in the Blanks

Atoms of the same element that have different numbers of neutrons are called

.

Multiple Choice

Why are some isotopes radioactive?

• Heating elements to high temperatures makes them radioactive.

• Some nuclei are unstable and emit radiation during decay.

• Elements heavier than carbon naturally emit radiation in all their forms.

• Excess electrons cause radiation to be emitted.

Multiple Choice

Which is a pure substance formed when two or more different elements combine?

• compound

• bond

• nucleus

• ion

Fill in the Blanks

A

is a compound in which the atoms are help together by covalent bonds.

Fill in the Blanks

________ bonds involve sharing of electrons between atoms, while _____ bonds involve the movement of electrons from one atom to the other.