First quiz review

Question 1

what is difference between physical property and chemical property

Answer 1

Physical property – description of substance. Ie. Colour, smell, taste, density.

Chemical property – Describes how a substance reacts when mixed with other substances. ie. Gas burns in heat and oxygen.

Question 2

what are observations that can be used as evidence from a chemical change

Answer 2

change of color
change of odour
heat produced
gasses
new substance formed

Question 3

the periodic table is organized by what

Answer 3

proton number

Question 4

the elements in group 1,2,17,18 are called what

Answer 4

group 1 is alkali metals
group 2 is alkaline earth metals
group 17 is called halogens
group 18 is called noble gasses

Question 5

Difference between a physical property and chemical property

Answer 5

Physical property is like description of substance ex texture, colour

Chemical property is how a substance reacts when mixed with other substance ie gas burns

Question 6

What is the difference between a physical change and a chemical change

Answer 6

Physical change does not make a new substance and is reversible
Chemical change creates a new substance and is Irreversible