Semester 1 review 2024

Front

What is the definition of a proton?

Back

A proton is a positively charged subatomic particle found in the nucleus of an atom. It determines the atomic number of an element.

Front

What happens to an atom when a proton is added or removed?

Back

The atom becomes a different element.

Front

How do you convert a number to scientific notation?

Back

To convert to scientific notation, express the number as a product of a number between 1 and 10 and a power of 10.

Front

Convert 520,000,000 to scientific notation.

Back

5.2 x 10^8

Front

Convert 0.000295 to scientific notation.

Back

2.95 x 10^{-4}

Front

Which subatomic particle has a positive charge?

Back

Protons have a positive charge.

Front

What is the charge of an electron?

Back

Electrons have a negative charge.

Front

What is the charge of a neutron?

Back

Neutrons have no charge (they are neutral).

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.