Formalae and Equations

Question 1

What are polyatomic/ compound ions?

Answer 1

covalently bonded ions eg. sulfate
ends with ‘ate’

Question 2

What is the carbonate ion?

Answer 2

CO3 2-

Question 3

What is the nitrate ion?

Answer 3

NO3-

Question 4

What is the phrosphate ion?

Answer 4

PO4 3-

Question 5

What is the hydroxide ion?

Answer 5

OH-

Question 6

What is the sulfate ion?

Answer 6

SO4 2-

Question 7

What is the silver ion?

Answer 7

Ag+

Question 8

What is the zinc ion?

Answer 8

Zn 2+

Question 9

What is the ammonium ion?

Answer 9

NH4+

Question 10

What is covalent bonding?

Answer 10

the joining of two atoms is not energetically favourable

Question 11

What is a lone-pair?

Answer 11

Two electrons in a covalent molecule that are not sharing any electroms with a different atom

Question 12

What is an element?

Answer 12

an atom containing one substance

Question 13

What is an atom?

Answer 13

a particle of matter that uniquely defines a chemical element

Question 14

What is a compound?

Answer 14

a mixture of two or more atoms that are chemically bound

Question 15

What is an ion?

Answer 15

a charged atom

Question 16

What is a molecule?

Answer 16

at least two atoms held together by covalent bonds

Question 17

What does the period number tell you on the periodic table?

Answer 17

number of shells in an atom

Question 18

What does the group number tell you on the periodic table?

Answer 18

number of electrons in the outer shell

Question 19

How is the periodic table arranged?

Answer 19

lists elements in order of increasing atomic number

Question 20

What is an electrons relative mass?

Answer 20

1/2000

Question 21

What are the relative masses of protons and neutrons?

Answer 21

both 1

Question 22

What is the atomic number?

Answer 22

number of protons
defines what the element is
does not change in chemical reaction

Question 23

What is a compound?

Answer 23

more than one element chemically bonded together

Question 24

What is an ionic compound?

Answer 24

it is formes by the transfer of 1 or more electrons from the atom of one element to an atom of another element

Question 25

What is a cation?

Answer 25

positively charged atom (loses electrons)

Question 26

What is an anion?

Answer 26

negatively charged atom (gains electrons)

Question 27

What are covalent substances?

Answer 27

atoms bonded to each other by covalent bonds formed when a pair of atoms share a pair of electrons

Question 28

What holds a covalent substance together?

Answer 28

the electrostatic attraction and the nuclei of the two atoms involved

Question 29

How do you know what compounds are covalently bonded?

Answer 29

Only non-metals present

Question 30

How do you know what compounds are ionically bonded?

Answer 30

made of a metal and a non-metal

Question 31

What is the formula for methane?

Answer 31

CH4

Question 32

What is the formula for nitric acid?

Answer 32

HNO3

Question 33

How do you produce an ionic equation?

Answer 33

1. write the full equation including state symbols 2. write full ionic equation 3. remove spectator ions ( ones that don't change state in reaction) solids, liquids and gases do not seperate as ions only aqueous solutions seperate in water as ions

Question 34

What happens when you dissolve an ionic compound in water?

Answer 34

it seperates into its induvidual ions