Semester 1 Review HChem 2022

Front

What is precision in measurements?

Back

Precision is a measure of how close measurements come to each other when they are made in the same way.

Front

What atom is represented by the symbol 'N'?

Back

Nitrogen.

Front

Is HCl a polar or nonpolar molecule?

Back

HCl is a polar molecule.

Front

What is the name of the group of elements that includes boron?

Back

The boron group.

Front

Why do most atoms have no net charge?

Back

Most atoms have no net charge because they have an equal number of electrons and protons.

Front

What is the definition of accuracy in measurements?

Back

Accuracy refers to how close a measurement is to the true value.

Front

What are transition metals?

Back

Transition metals are elements found in groups 3-12 of the periodic table, known for their ability to form variable oxidation states.

Front

What are halogens?

Back

Halogens are the elements found in group 17 of the periodic table, known for being highly reactive nonmetals.

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in an atom's nucleus and determines the element's identity.

Front

What is a polar molecule?

Back

A polar molecule has a distribution of electrical charge that leads to a positive end and a negative end.