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SNC 1D: Chemistry Unit Test Flashcards | StudBud
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SNC 1D: Chemistry Unit Test
SNC 1D: Chemistry Unit Test
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Answers
1
Compounds are made up of elements
False
True
2
Strontium metal gives off a blue flame
True
False
3
Mixtures can exist as solids, liquids, or gases.
False
True
4
The gas that "pops" when ignited with a burning splint is ________________.
oxygen
nitrogen
hydrogen
carbon dioxide
5
Which of the following is an element as well as a molecule
Ca
CO2
14 kt gold
O2
6
In a neutral atom, the number of electrons always equals the number of neutrons
False
True
7
___________proposed the plum pudding model
Bohr
Rutherford
Aristotle
Thomson
8
A certain type of brass is 75% copper and 25% zinc. Brass is
a molecule
a compound
an element
an alloy
9
A sulfide ion has 16 protons and a charge of 2-. How many electrons does a sulfide ion have?
34
8
14
18
10
Which of the following groups of elements is the least reactive?
alkaline earth metals
halogens
noble gases
alkali metals
11
A gas that can re-ignite a glowing splint is oxygen
False
True
12
Which of the following is a compound?
sodium
chlorine
water
oxygen
13
Non-metals are lustrous, ductile, and malleable.
False
True
14
An electron
positive and orbits the nucleus
is negative and is located in the nucleus
is postive and is located in the nucleus
negative and orbits the nucleus
15
The alkali metal family, the elements lower in the column are more reactive.
True
False
16
In a physical change, a new substance is produced.
True
False
17
What does the formula N
2
represent?
a compound and an element
a molecule and a compound
an atom and an element
an element and a molecule
18
Which of the following statements is true according to the particle theory of matter?
only particles of solids move
all particles of matter move
particles of matter never move
only particles of liquids and gases move
19
Which group of elements belongs in the alkaline earth metal family?
Mg, Ca, Sr
Li, Na, K
Li, Be, B
O, S, Se
20
the outermost electron orbits of the noble gases have:
one electron
eight electrons
two electrons
the maximum number of electrons
21
Burning is an example of a chemical change.
True
False
22
Which of the following is a solution?
granola
sand
orange juice
salt water
23
The identity of an element is determined by
the number of neutrons in the atom
the number of electron orbits in the atom
the mass of the atom
the number of protons in the atom
24
From the gold foil experiment, Rutherford theorized that the atom:
is mostly empty space with electrons evenly spread out
is mostly empty space with protons evenly spread out
has a nucleus containing electrons
has a nucleus containing protons
25
Corrosion is the reaction between a metal and
a non-metal
a metal
oxygen
fire
26
Change of state is
a chemical change
a physical change
27
To determine the number of neutrons, subtract the mass number from the atomic number.
False
True
28
A change of colour is evidence of:
chemical change
physical change
chemical property
physical property
29
Matter
takes up space
is everything
has mass
all of these
30
In Bohr's atomic model, the first electron orbit holds a maximum of 8 electrons
True
False
31
The element whose atom has 16 protons is
Magnesium
Sulfur
Carbon
Oxygen
32
The atomic number tells us the number of:
electrons in the outermost orbit
neutrons
protons
protons and neutrons
33
Which phrase best describes a group or family on the periodic table?
elements that have the same # of e- in their outer shell
elements have the same melting point
elements that are all in the same physical state
elements that have the same number of protons in the nucleus
34
Glucose has the formula C
6
H
12
O
6
. What is the total number of atoms in one molecule?
3
12
24
6
35
Which phrase correctly defines density?
the ratio of a substance's volume to its weight
the ratio of a substance's mass to its volume
the ratio of a substance's mass to its weight
the ratio of a substance's length to its volume
