N bio ch. 2 lesson 1 part 2

a substance formed by the chemical combination of two or more elements in definite proportions

• chemical compound

• chemical bond

• covalent bonds

• chemical combination

Which are examples of how a chemical compound is shown?

• H2O

• NaCl

• O

• N

The physical and chemical properties of a compound are usually ___________ those of the elements from which it is formed.

• very different from

• the same as

Atoms in compounds are held together by ______.

• chemical bonds

• physical bonds

• molecular bonds

The electrons in an atom’s outer shell that are available to form bonds are called _____.

• valence electrons

• outer electrons

• atomic electrons

Which are types of chemical bonds?

• ionic bonds

• covalent bonds

• atomic bonds

a bond formed when one or more electrons are transferred from one atom to another

• ionic bond

• covalent bond

Atoms become _______ when they become positively or negatively charged.

• ions

• bonds

• electrons

• neutrons

This is an example of a .......

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• ionic bond

• covalent bond

This is an example of a(n) _______

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• ionic bond

• covalent bond