Chemistry Midterm

Front

What does the notation '12C' represent in terms of protons and neutrons?

Back

12 is the mass number, which is the sum of protons and neutrons. In this case, 6 is the number of protons and 6 is the number of neutrons.

Front

What type of elements are typically found on the left side of the periodic table?

Back

Metals.

Front

What is a neutron?

Back

A subatomic particle that has mass nearly equal to that of a proton but carries no electrical charge.

Front

What does it mean for a measurement to be accurate and precise?

Back

Accurate means the measurement is close to the true value, and precise means the measurements are consistent with each other.

Front

Which group of elements has 1 valence electron?

Back

Group 1.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What are metalloids?

Back

Elements that have properties of both metals and nonmetals.

Front

What is the significance of valence electrons?

Back

They determine how an element reacts chemically with other elements.