The number of protons plus neutrons in an atom, represented as an average of all naturally occurring forms of the element, is known as ________________.

_________________, also called micronutrients, are any chemical element required by living organisms in miniscule amounts, but cells require them to survive.

___________________ is one of the four elements that make up 96.3% of living cells.

___________________ is one of the seven elements that make up a small fraction, approximately 3.7%, of living cells.

___________________ is one of the fourteen trace elements and is a component of certain digestive enzymes and other proteins.

What is a, b and c? Click 3 answers!

What is d? Protons have what kind of charge?

What is e? Where do you find protons and neutrons?

What is f? What kind of charge does the electron have?

What is g? The number of protons determine what?

What is h? The number of protons and neutrons in the nucleus determine what?

Researchers studying the effects of toxic wastes knew that animals were poisoned by the heavy metal cadmium, but they wanted to know where cadmium accumulated in the body. They could find out by _____.

The innermost electron shell of an atom can hold up to _____ electrons.

Which of these relationships is true of an uncharged atom?

What determines the types of chemical reactions that an atom participates in?

A phrase that applies to covalent bonding and not other kinds of bonds is ...

What type of bond is joining the two hydrogen atoms?

A(n) neutral group of two or more atoms held together by chemical bonds is a _________________.

This atom can form up to _____ single covalent bond(s).

A(n) _____ bond joins these two oxygen atoms.

Which answer correctly ranks the atoms in terms of decreasing electronegativity (the highest electronegativity first)?

Which atom in the pictured molecule will have the strongest partial positive charge?

Dr. Haxton says the O-O bond is polar and the C-C bond is nonpolar. A good student would say ...

When two atoms of the same kind form a covalent bond, they share electrons equally because their electronegativity is the same.

If you want a molecule that is highly polar, look for one that contains:

Atoms with the same number of protons but with different electrical charges _____.

In salt, what is the nature of the bond between sodium and chlorine?

An ionic bond involves _____.

Which of these figures correctly illustrates the nature of the bonding of H₂O?

What type of bond joins the carbon atom to each of the hydrogen atoms?

A(n) ___________ bond forms when one atom gives up one or more electrons to another atom.

Atoms or molecules with a net electric charge due to the loss or gain of one or more electrons are __________.

A(n) ___________ bond involves the sharing of electron pairs between atoms, also known as a molecular bond.

When one pair of electrons is shared between two atoms, a ____________ bond is formed.

When two pairs of electrons are shared between two atoms, a ___________ bond is formed.

A ___________ bond is a type of chemical bond where a pair of electrons is unequally shared between two atoms. As a result, one end of the molecule has a slightly negative charge and the other a slightly positive charge.

Atoms involved in a ___________ bond equally share electrons; there is no charge separation to the molecule.

A weak bond called a __________ bond results from an attraction between a slightly positive region in a molecule and a slightly negative region in the same or a different molecule.

Refer to this summary equation of photosynthesis to complete the sentences about chemical bonds and reactions.

6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂

The equation shows a ___________________ --the breaking and forming of chemical bonds that leads to a change in the composition of matter.

Refer to this summary equation of photosynthesis to complete the sentences about chemical bonds and reactions.

6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂

In the equation, CO₂ is a _______________.

Refer to this summary equation of photosynthesis to complete the sentences about chemical bonds and reactions.

6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂

In the equation, C₆H₁₂O₆ is a _______________.

Refer to this summary equation of photosynthesis to complete the sentences about chemical bonds and reactions.

6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂

In O₂, the type of bond that holds the two oxygen atoms together is a _______________.

Refer to this summary equation of photosynthesis to complete the sentences about chemical bonds and reactions.

6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂

In H₂O, the type of bond that holds one of the hydrogen atoms to the oxygen atom is a _______________.

Refer to this summary equation of photosynthesis to complete the sentences about chemical bonds and reactions.

6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂

The number of oxygen atoms on the left side of the equation is _____________ the number of oxygen atoms on the right side.

Can you label the atoms, partial charges, and types of bonds associated with these water molecules?

What atoms are a and c?

Can you label the atoms, partial charges, and types of bonds associated with these water molecules?

What atom is b?

Can you label the atoms, partial charges, and types of bonds associated with these water molecules?

What kind of charge does d have?

Can you label the atoms, partial charges, and types of bonds associated with these water molecules?

What kind of charge does e have?

Can you label the atoms, partial charges, and types of bonds associated with these water molecules?

What type of bonds do you find between the water molecules (f)

Can you label the atoms, partial charges, and types of bonds associated with these water molecules?

What type of bonds holds the water molecule together?

When water freezes, ice floats. Why?

A typical soda contains sugar, flavorings, coloring agents, and carbon dioxide that have been dissolved in water. Soda is therefore _____.

What property of water makes it move upward from the roots of plants? Choose two answers!

Astrobiologists searching for signs of life on other planets primarily search for __________.

The levels of carbon dioxide are expected to _____ of our oceans.

A substance that cannot be broken down into other substances by ordinary chemical procedures is known as a(n) _____.

What name is given to this molecule?

How did this molecule form?

What name is given to this molecule?

Which of these is the correct equation for the dissociation of water?

What is the charge on a hydronium ion?

What is the charge on a hydroxide ion?

Grapefruit juice is approximately pH 3, and tomato juice is approximately pH 4. A glass of grapefruit juice contains _____ H⁺ as a glass of tomato juice.

The term for a solution with a low pH number, such as lemon juice or vinegar, is _________.

The term for a solution that has an equal concentration of H⁺ and OH^- is _________.

The term for a solution with a high pH number, such as ammonia or bleach, is _________.

An acid is a compound that donates _________ to a solution.

The higher the pH number, the higher the concentration of _______ in a solution.

A substance that accepts H⁺ when they are in excess and donates H⁺ when their concentration drops is called a(n) ______________.