Which of the following statements is TRUE?

Liquids are held together by Intermolecular Forces

Which statement is True!

Solids are held together by very strong intermolecular forces

Which answer shows examples of chemical changes?

fireworks, baking a cake, digesting food

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Basic Periodic Table

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A review of topics that general chemistry students should already know about the periodic table.

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Questions 15

Answers

1
Hydrocarbons are combustible
True
False
2
How many valence electrons does an atom of Calcium (Ca) have?
8
2
1
3
3
Which of the following statements is TRUE?
Gasses curve around corners
Liquids are held together by Intermolecular Forces
Solid particles are motionless
The coldest substance on the planet is liquid Nitrogen.
4
A negative ion is know as a(n) ___.
valence electron
anion
cation
ionic radius
5
How many electrons in an atom of Gold (Au)?
198
119
none of the above
79
6
Which statement is True!
There are no forces of attraction between liquid molecules.
Plasma is safe to hold in your hand.
Gases travel around the room in curved pathways
Solids are held together by very strong intermolecular forces
7
What is the atomic number of Tin (Sn)?
119
50
48
22
8
Which answer shows examples of chemical changes?
cutting vegetables, mowing the lawn, freezing water
cutting your hair, burning paper, melting ice cream
fireworks, baking a cake, digesting food
building a fire, making toast, breaking a pencil
9
What determines the position of each element in the periodic table?
number of isotopes
number of neutrons
number of protons
mass number
10
Which of the following is considered by chemists around the world to be a transition metal?
aluminum (Al)
lead (Pb)
silver (Ag)
magnesium (Mg)
11
What is the average atomic mass of Iodine (I)
53 amu
126.91 g/mol
126.91 amu
53 g/mol
12
To which group do fluorine and chlorine belong?
alkaline-earth metals
halogens
transition metals
actinides
13
How many neutrons does an isotope of Xenon - 126 have?
72
none of the above
54
126
14
Elements to the left side of the periodic table have properties most associates with
gases
metalloids
metals
nonmetals
15
What is the molar mass of Sulfur (S)?
28.09 g/mol
32
32.06 g/mol
32.06 amu

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