chemistry 18/10/24

Question 1

what is the colour of the sodium flame test

Answer 1

yellow

Question 2

what is the colour of the pottasium flame test

Answer 2

lilac

Question 3

what is the colour of the lithium flame test

Answer 3

red

Question 4

what is the colour of the copper flame test

Answer 4

blue/green

Question 5

what is the colour of the calcium flame test

Answer 5

orange/red

Question 6

what is the colour of the barium flame test

Answer 6

green

Question 7

what is an element

Answer 7

a substance made up of only one type of atom

Question 8

what is a mixture

Answer 8

consists of two or more different substances not chemically bonded

Question 9

what is a compound

Answer 9

a pure substance made of more than one type of element chemically bonded in a fixed ratio

Question 10

what is redox

Answer 10

it is reduction and oxidation

Question 11

ionic bonding

Answer 11

where one atom gives up one or more electron to another atom

Question 12

covalent bonding

Answer 12

a chemical bond where electrons are shared between two or more atoms

Question 13

what is sublimation

Answer 13

solid to gas

Question 14

what is evaporation

Answer 14

liquid to gas

Question 15

what is solid to liquid

Answer 15

melting

Question 16

what is liquid to solid

Answer 16

freezing