Ch 5 Atoms and Bonding

Question 1

What is an atom or group of atoms that has an electric charge?

Accepted Answer

ion

Question 2

When an atoms gains two electrons to reach a total of eight, it started with how many?

Accepted Answer

six

Question 3

What charge does an ion have when the atom LOSES an electron?

Accepted Answer

positive

Question 4

A neutral group of atoms joined by covalent bonds is called a(n)...

Accepted Answer

molecule

Question 5

Which of the following does NOT apply to valence electrons?

Accepted Answer

make up most of the atom's mass

Question 6

What part of this water molecule is slightly more positive?

Accepted Answer

bottom

Question 7

When electrons are shared unequally in a covalent bond, the molecule is...

Accepted Answer

polar

Question 8

How many electrons are shared in a double bond?

Accepted Answer

four

Question 9

Most atoms are not reactive after they have how many valence electrons?

Accepted Answer

eight

Question 10

What is a mixture made of two or more elements that has the properties of a metal?

Accepted Answer

alloy

Question 11

How many valence electrons does group 2 have?

Accepted Answer

two

Question 12

Ionic compounds have what charge? example: what is the charge on NaCl ?

Accepted Answer

neutral

Question 13

What part of this water molecule is slightly more negative?

Accepted Answer

top

Question 14

On the periodic table, which of the following have the same number of valence electrons?

Accepted Answer

group

Question 15

How many valence electrons do the elements in Group 17 have?

Accepted Answer

seven

Question 16

What charge does this hydrogen molecule (H2) have?

Accepted Answer

neutral

Question 17

Which of the following is NOT a characteristic of ionic bonds?

Accepted Answer

shares electrons

Question 18

The most stable (happy) elements in the periodic table are found in the family of..

Accepted Answer

noble gases

Question 19

If electrons are shared equally in a covalent bond, it is...

Accepted Answer

nonpolar

Question 20

Which of the following is NOT a characteristic of covalent bonds?

Accepted Answer

gains or loses electrons

Question 21

How many valence electrons does group 15 have?

Accepted Answer

five

Question 22

An attraction between a positive metal ion and the "sea" of electrons surrounding it is a(n)...

Accepted Answer

metallic bond

Questions 22