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Atoms and the Periodic Table
Atoms and the Periodic Table
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Quiz on atoms and the periodic table #8thgradephysicalscience
Flashcards
15 cards
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Questions
15
Answers
1
Chlorine and bromine are both what?
Metalloids
In the same group
In the same period
Compounds
2
Phosphorus is in group 15 on the periodic table. What is its average atomic mass?
15
31
45.974
30.974
3
What is the mass number of an atom with 8 protons, 8 electrons, and 10 neutrons?
18
8
10
16
4
Which of these particles is smallest?
Proton
Atom
Molecule
Element
5
Why do elements in group 15 share similar chemical properties?
They are found in the same period
They all have the same atomic number
Their atoms have the same number of valence electrons
They are all nonmetals
6
What is the name for a row on the periodic table?
Group
Period
Family
Section
7
What is the chemical symbol for Sodium?
Di
Dm
So
Na
8
What is the symbol for the element with an atomic number of 10?
B
Ne
Cl
Pb
9
Helium has an atomic number of 2. What does the atomic number tell you?
The average atomic mass
The number of protons in a helium atom
The group number of helium
The period number of helium
10
Boron, silicon, germanium, arsenic and selenium are all what?
Non-metals
Noble Gases
Metalloids
Halogens
11
Which of these is a true statement about elements in a
period
?
Atomic numbers increase by 1 left to right
Atomic numbers increase by 1 from top to bottom
Atomic masses increase by one from top to bottom
Atomic masses increase by 1 left to right
12
If an atom has 5 protons and 3 neutrons, how many electrons does it have?
8
2
5
3
13
How many neutrons does K have if its atomic number is 19 and atomic mass is 39?
58
19
20
39
14
If an atom had an atomic number of 50 and a mass number of 80, how many neutrons are there?
50
80
130
30
15
What two things do you add to find an element's mass number?
Neutrons and electrons
Electrons and protons
Protons, neutrons, and electrons
Protons and neutrons
