Crash Course Matter: Nucleus Quizizz

Who mathematically proved the existence of atoms in 1905?

• Nick Jenkins

• Einstein

• Robert Brown

• Dr. Heiko Langner

What is the defining trait of an element?

• Atomic mass

• Atomic number

• Mass number

• Number of neutrons

What is the role of neutrons in the nucleus?

• Change the properties of an atom

• Create chemical reactions

• Stabilize the nucleus

• Repel protons

What is the reason for relative atomic masses to not be whole numbers?

• Different isotopes of the same element

• Number of protons

• Atomic weight

• Chemical properties

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• Variable

What is the chemical symbol for silver?

• Au

• Ag

• Sv

• Si

What is the scientific definition of 'theory'?

• A well-tested set of ideas that explains many disparate observations

• A proven fact

• A guess

• A hypothesis

Select the properties of a proton.

• In the nucleus

• Outside the nucleus

• Positive charge

• Mass of 1 amu

• Mass of 0 amu

Select the properties of a neutron.

• In the nucleus

• Outside the nucleus

• Neutral charge

• Mass of 1 amu

• Mass of 0 amu

Select the properties of an electron.

• In the nucleus

• Outside the nucleus

• Negative charge

• Mass of 1 amu

• Mass of 0 amu