Log in
Sign up for FREE
arrow_back
Library
year 9 Science Homework Week 7
By Naomi Arthur
star
star
star
star
star
Share
share
Last updated over 4 years ago
15 questions
Add this activity
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
Question 6
6.
Question 7
7.
Question 8
8.
Question 9
9.
Question 10
10.
Question 11
11.
Question 12
12.
Question 13
13.
Question 14
14.
Question 15
15.
In which state of matter are the particles in a regular arrangement?
solids
liquids
gases
Which two states of matter cannot be compressed?
Solids and gas
Liquids and solids
Gases and liquids
What will cause particles to gain more energy?
Increase in temperature
Decrease in temperature
No change in temperature
What is a molecule?
Two or more atoms are chemically joined
One atom chemically joined
Two or more elements chemically joined
How many oxygen atoms are there in O3?
1
2
3
What is a compound?
two or more atoms chemically joined together
two or more different elements chemically joined together
Two or more molecules chemically joined together
What is a pure substance?
A substance that consists of a mixture of elements
A substance that consists of a mixture of atoms
A substance that consists of only one element or compound
Who’s model described an atom as a solid sphere?
rutherford
thompson
dalton
What was discovered that led Thompson to change the atomic model?
Positive Protons
Neutral neutrons
Negative electrons
What does the plum-pudding model show?
Positively-charged protons embedded in a sphere of negative charge
Negatively-charged electrons embedded in a sphere of positive charge
Negatively-charged neutrons embedded in a sphere of positive charge
If the plum-pudding model was accurate what would have happened in the alpha-particle scattering experiment?
All the alpha particles should have passed directly through the gold foil
All the alpha particles should have been deflected
All the alpha particles should have been reflected straight backwards
What is the relative mass of protons and neutrons?
1
0
-1
What is the relative charge of electrons?
+1
0
-1
What is the relative charge of protons?
+1
0
-1
How many protons does oxygen have?
8
16
24