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