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Atoms and Elements
Atoms and Elements
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7th grade science review of atoms and the Periodic Table of the Elements.
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
What is the symbol for Calcium?
C
Ca
Co
Cm
2
How many protons are in Potassium (K)?
20
39
19
21
3
How many protons, neutrons, and electrons are in Nitrogen?
7 protons, 14 neutrons, 7 electrons
7 protons, 7 neutrons, 14 electrons
14 protons, 14 neutrons, 14 electrons
7 protons, 7 neutrons, 7 electrons
4
What element has the symbol He?
Hydrogen
Mercury
Helium
Houston
5
What element does not have any neutrons in its most common form?
noble gasses
Helium
Hydrogen
all radioactive elements
6
How many protons are in Silicon?
14
13
28
15
7
Which of these is a synthetic element?
Bohrium
Neodymium
Lead
Tungsten
8
How many neutrons are in Lead?
124
207
82
125
9
How do you determine the number of neutrons in an atom?
Atomic number - Atomic mass
Atomic Mass - Atomic Number
Atomic Mass plus Atomic number
Atomic Number - electrons
10
What is the atomic number for Pt?
78
195
46
15
11
What is the overall charge of the nucleus?
negative
positive
neutral
elective
12
What kind of charge do protons have?
positive
negative
neutral
13
What can the atomic number tell you about an atom?
The mass of the atom
The number of neutrons
How many isotopes there are
The number of protons
14
Which of these is a natural substance?
cell phone
nitrogen
steel nails
asphalt
15
What element is this a model of?
Lithium
Hydrogen
Beryllium
Helium
16
This is a diagram of what element?
Oxygen
Nitrogen
Boron
Carbon
17
What is the mass of Manganese?
54.94
25
30
29
18
Which of these is NOT a natural substance?
mud
Cement
basalt
granite
19
What type of charge do neutrons have?
neutral
positive
negative
20
The symbol, Si, stands for which element?
Silicon
Silicone
Scandium
Sulfur
21
What would be the atomic mass of Carbon?
14
6
12
8
22
What are isotopes?
Atoms of the same element with different number of neutrons
Atoms of the same element with different number of electrons
Atoms of the same element with the same mass
Atoms of the same element with different number of protons.
23
How many electrons are in a stable atom of Cobalt?
27
59
32
58
24
What particles are found in the nucleus?
protons & electrons
protons & neutrons
electrons & neutrons
25
What type of charge do electrons have?
negative
positive
neutral
