Intro Chem Quiz Review

How many valence electrons are in Nitrogen?

Which particle in the nucleus of an atom has a neutral charge?

The fact that water can dissolve many different substances, such as sugar and salt, is best described by which property?

Bonds in which electrons are shared

Th element present in all four biological molecules that are essential for life

On which axis would you place the independent variable?

Surface tension is a good example of...

Drops of dew on grass blades is a good example of...

The ability of water molecules to stick to other things is...

How many electrons are in Nitrogen?

How many neutrons are in Nitrogen?

Nitrogen is element 7. Choose the correct model of a nitrogen atom.

Which represents a formula for a chemical compound or molecule?

A chemical compound that has no negative or positive regions

Why are biologists so interested in chemistry?

The measurement of the hydrogen ions in a solution

A molecule that has unequal distribution of electrons or opposite charges on each end of the molecule (like water!)

Which is not a unique property of water?

What is the independent variable in this lab?

The building blocks of matter

Pure substances made of only one type of atom

Why does water float as a solid?

A substance that dissolved in another substance

How many protons are in Nitrogen?

Two or more elements chemically bonded together with new chemical or physical properties (NaCl, H2O, C6H12O6)

At what pH does this enzyme's reaction occur the fastest?

Which particle in an atom is involved in bonding?

An attractive force occurring between polar molecules

Water is a polar molecule because...

Does this enzyme prefer an acidic or basic environment? How do you know?

A molecule of water (H2O) has which bonds?

On the pH scale, which would best describe the pH of an acid?

The ability of water molecules to stick to other water molecules is...