Honors Biology Chapter 2 AC

Which of these atoms tends to be electronegative?

Carbon-14 converts to this isotope during beta-decay.

How many protons does an H+ ion have?

How many molecules are represented in the equation:  2CO + O₂ → 2CO₂

A substance with a pH of 4 is called

Water is _ compound

Basic unit of life.

The varying energy levels found in an electron cloud is termed a(n) electron ___. 

There are _____ naturally occurring elements. 

In a plant, water climbs a series of long tubes called xylem using ___.

Which of these is an acid?

How many electrons does an H+ ion have?

The surface tension in water is caused by:

When hydrogen and oxygen combine to form water, water would be 

Double bonds are stronger than single bonds.

As water cools, it ___ heat to the surroundings.

Solutions that can resist changes in pH.

How many more H+ ions are found in a solution with a pH of 3 vs PH of 7?

The ions in weak acids ___.

Ice floats because of:

The stomach contains hydrochloric acid with a pH of 1. What does the stomach digest?

Which of the following would be considered an oxygen isotope? 

What type of ion forms when an atom loses electrons?

The most abundant compound in most living things is

The SI unit for heat energy is:

Covalent bonds allow geckos to walk on glass.

Which of the following elements is NOT one of the six most common in living organisms?

Which of the following ions will most likely not play a major role in cell functions? 

Without hydrogen bonding, water would boil at ___ °C

How many kinds of atoms (elements) are in this equation: 2CO + O₂ → 2CO₂

Attracted to water.

If a reaction in one direction releases energy, the reaction in the opposite direction 

Which statement is NOT true about elements? 

How can radioisotopes be used in biology?

Salts are solid substances that exist as individual ions in water.

Force of attraction between the molecules of two different substances

Uranium has 92 protons. It has a mass of 238 AMU. How many electrons does it have?

The space surrounding the nucleus of an atom contains

Which of these is a base?

When salt is dissolved in water, water is the 

The amount of energy required to melt 1 gram of ice is:

Matter cannot be created nor destroyed, but only change form. 

In a water molecule, the oxygen has a slight ___ charge.

Which of the following elements would be the most reactive.

Which of the following makes up a molecule of water?

What type of electron is available to form bonds?

How many more hydrogen ions does a solution with a pH of 1 have than a solution with a pH of 6?

Bond formed when electrons are shared.

These bonds form when electrons are lost or gained.

The concentration of H+ in a solution.

The amount of energy required to raise 1 gram of water 1 degree Celsius.

Term that describes water's ability to climb vertical surfaces is:

When a compound forms, the physical and chemical properties of the elements change.

An element with variable neutrons.

How many neutrons does an H+ ion have?

If a substance has 1 hydrogen ion per 100 water molecules, what is the pH of the solution?

When hydrogen is attracted to oxygen in water, a ______ bond forms.