IPS Chemical Interactions Chapter 1 Section 3

Question 1

ion

Answer 1

atom or group of atoms that has an electric charge

Question 2

when an atom loses an electron it…

Answer 2

loses a negative charge and becomes a positive ion

Question 3

when an atom gains an electron it…

Answer 3

gains a negative charge and becomes an ion

Question 4

ions that are made of more than one atom are

Answer 4

polyatomic ions

Question 5

polyatomic ion is a group of atoms that

Answer 5

reacts as a unit

Question 6

how does an ion with a charge of 2+ form?

Answer 6

another atom lost 2 electrons

Question 7

ionic bond

Answer 7

the attraction between positive and negative ions

Question 8

ionic compound

Answer 8

consists of positive and negative ions (sodium chloride)

Question 9

what is a chemical formula?

Answer 9

a combination of symbols that shows the ratio of elements in a compound

Question 10

what happens when ionic compounds form?

Answer 10

the ions come together in a way that balances out the charges on the ions.

Question 11

subscript

Answer 11

tells you the ratio of elements in the compound

Question 12

what comes first in an ionic compound?

Answer 12

the name of the positive ion followed by the name of the negative ion

Question 13

describe ionic compounds

Answer 13

they are hard , brittle crystals that have high melting points.

Question 14

what happens when ionic compounds are dissolved in water or melted

Answer 14

they conduct electricity

Question 15

what is a crystal?

Answer 15

an orderly, three dimensional arrangement of ions or atoms in a solid

Question 16

in an ionic compound every ion is attracted to ion of

Answer 16

opposite charges that surround it

Question 17

three properties of ionic compounds are

Answer 17

ionic crystals, high melting points, and electrical conductivity

Question 18

what happpens when you head an ionic compound such as table salt

Answer 18

the energy increases

Question 19

what is an electric current

Answer 19

the flow of charged particles

Question 20

what happens when ionic crystals dissolve

Answer 20

the bonds between the ions are broken and the ions are free to move about and the solution conducts current

Question 21

what happens to ionic compounds in solid form

Answer 21

they do not conduct current

Question 22

what are 2 basic ways ions form from atoms

Answer 22

atoms gain or lose electrons

Question 23

what holds ions together in sodium chloride

Answer 23

The positive sodium ions and negative chloride ions attract each other.

Question 24

what information is given by the formula of an ionic compound

Answer 24

the ratio of the ions