Bio 181 Final

Front 1

A covalent bond between two atoms is likely to be polar if:

Back 1

one of the atoms is much more electronegative than the other

Front 2

A triple covalent bond would:

Back 2

involve the sharing of six electrons

Front 3

How many electrons does phosphorus have in its valence shell?

Back 3

5

Front 4

A potassium ion (K+) contains 18 electrons, 19 protons, and 20 neutrons. What is the atomic number of potassium?

Back 4

19

Front 5

What is the difference between a molecule and a compound?

Back 5

A compound consists of two or more elements in a fixed ratio; a molecule has two or more covalently bonded atoms of the same or different elements

Front 6

NaCl (table salt) is a molecule

Back 6

False

Front 7

Diatomic molecules consists of ___ atoms

Back 7

2

Front 8

In a non-polar covalent bond, electrons are _____ and _____ _____ to the atoms' nuclei

Back 8

shared/evenly attracted

Front 9

Water is a compound held by hydrogen bonds

Back 9

True

Front 10

Atomic number refers to:

Back 10

number of protons in the atom's nucleus