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Grade 9 Chemistry Review Flashcards | StudBud
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Grade 9 Chemistry Review
Grade 9 Chemistry Review
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A review of the chemistry unit for grade 9 academic #science
Flashcards
27 cards
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Questions
27
Answers
1
What is the ratio of Oxygen to Hydrogen in Water?
1:1
1:2
22:1
2:1
2
state the number of oxygen atoms:
12
72
24
4
3
what is the significance of the gold foil experiment?
helped discover the negatively charged electrons
helped discover matter is made of tiny indivisible particles
helped discover the plum pudding model
helped discover there was a positively charged nucleus
4
how many shells does silicon have?
4
2
1
3
5
when metals loose electrons, they become ________.
non-metals
anions
cations
6
what colour on the following periodic table depicts the Alkaline Earth Metals
pink
blue
purple
orange
7
if you heat an ice cube until it melts, what is this an example of?
physical change
physical property
chemical change
chemical property
8
what is the density of a metal with a volume of 738cm
3
and a mass of 14250g?
0.0518g/cm3
19.3g/cm
10 516 500g/cm3
19.3g/cm3
9
Which of the following chemical formulas represents an element?
OH
CO
NaOH
O2
10
what is the significance of the bold staircase line on the periodic table
separates hydrogen from the rest of the elements
highlights where the metalloids are found
highlights where the noble gasses are found
separates solids and liquids
11
in the periodic table we use TODAY, the elements are arranged by increasing mass
false
true
12
if a sulfide atom has 16 protons and a charge of -2, how many electrons does it have?
34
18
14
8
13
how many electrons would an atom have if it has 4 shells and a full valence octet?
24
32
26
30
14
which of the following is NOT a physical property of the substance shown
toxic
powdery
odourless
white
15
the burning splint test is used to identify oxygen
false
true
16
The reactivity of metals increases as you go from left to right of the periodic table.
False
True
17
which of the following occupies more space?
5g of liquid gold
5g of solid gold
18
which of the following is a compound?
oxygen
water
sodium
chlorine
19
Whose model of the atom is the following diagram depicting?
Dalton
JJ Thompson
Bohr
Rutherford
20
Find the name, mass number and number of electrons in this element
Potassium, 30, 15
Silicon, 32, 16
Sulfur, 32, 16
Sulfur, 30, 16
21
an isotope of carbon has more electrons in its bohr diagram than regular carbon
False
True
22
the mass of a substance is an example of a qualitative property
true
false
23
which of the following group 17 elements would you expect to be the most reactive?
bromine
chlorine
fluorine
24
Which of the following is an example of a HETEROGENEOUS mixture?
water
vinegar
stainless steel
blood
25
What is the atomic number of Fluorine?
19
fluorine
9
10
26
which of the following is NOT a main idea of the particle theory of matter?
All matter is made up of tiny particles with spaces between
Particles are in constant random motion
Particles repel each other
Particles move faster as temperature increases
27
what is the maximum number of electrons allowed in the first shell?
6
2
4
8
