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Chemical reactions

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Last updated 4 days ago
61 questions
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Question 1
1.

Where is most of the mass of the atom found?

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Question 2
2.

Which statement best describes the image.

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Question 4
4.

Question 5
5.

If you see something in the classroom or laboratory that is dangerous, tell the teacher

Question 6
6.

Any spill on the floor can cause an accident. Always clean it up

Question 7
7.

When you work with laboratory chemicals and bunsen burners, long hair must be

Question 8
8.

What is the smallest particle into which an element can be divided and still be the same substance?

Question 9
9.

What part of the atom has a positive charge?

Question 10
10.

What part of the atom has a negative charge?

Question 11
11.

What part of the atom has a no charge?

Question 12
12.

What is found in the center of an atom

Question 13
13.

What subatomic particles are found in the nucleus? Check all that apply

Question 14
14.

On a drawing a proton is shown with the symbol____?

Question 15
15.

On a drawing a electron is shown with the symbol____?

Question 16
16.

An electron is found...

Question 17
17.

The main parts of an atom are?

Question 18
18.

Isotopes are atoms of the same element with the same number of protons and

Question 19
19.

What is the maximum number of electrons that are allowed on the second shell/orbit?

Question 20
20.

An atom becomes negatively charged by

Question 21
21.

Potassium has an atomic number of 19 and a mass number of 39. So, it has _________________neutrons.

Question 22
22.

Which statement is true about the Periodic Table?

Question 23
23.

In the Periodic Table, the vertical columns that extend down the Periodic Table are called

Question 24
24.

Hydrogen is located in Group_________of the Periodic Table.

Question 25
25.

Which scientist is credited with inventing the Periodic Table?

Question 26
26.

In the Modern Periodic Table, the elements are arranged in order of

Question 27
27.

Copper

Question 28
28.

Fluorine

Give the element name that matches the symbol below.
Question 29
29.

Au

Question 30
30.

Ge

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Question 35
35.

Select the general properties of metals:

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Question 54
54.

What is an example of an exothermic reaction?

Question 55
55.

Endothermic reactions release energy stored in chemical bonds.

Question 56
56.

A balanced equation demonstrates...

Question 57
57.

State one way that you could speed up the rate of a chemical reaction.

Question 58
58.

What characteristics do endthermic reactions have? (select all that apply)

Question 59
59.

What characteristics do exothermic reactions have? (select all that apply)

Question 60
60.

Select two examples of endothermic reactions.

Question 61
61.

Select two examples of exothermic reactions.

The atoms are ions
The atoms represent different elements
Question 3
3.

Explain why you chose your answer for #2.

Select the type of subatomic particle that matchs the statement.
Electron
Neutron
Proton
NOT found in the nucleus
Has no charge
Has +1 charge
Has -1 charge
Identifier of the element
Has almost no mass
a different number of molecules
a different number of neutrons
the same number of neutrons
losing an electron
losing a proton
gaining a neutron
Each horizontal row of the Periodic Table is called a group
Each vertical column of the Periodic Table is called a period
All of the above are correct
Watson and Crick
Albert Einstein
Dimitri Mendeleev
increasing atomic volume
increasing atomic number
the alphabet
Question 31
31.

What group is column 2

Question 32
32.

What Group is Column 17?

Question 33
33.

What Group is Column 18?

Question 34
34.

Why does Tungsten have a chemical symbol W?

Question 36
36.

What is the bunsen burner used for?

Question 37
37.

The utility clamp and the iron ring can both be attached to help hold beakers, test tubes, and flasks.

Question 38
38.

You do not need to wear safety glasses if you have eye glasses or contacts.

Question 39
39.

It is ok to put your hand on the pan if you want to know how much it mass it has.

Question 40
40.

This tool is best used to meausre the volume of liquids

Question 41
41.

This tool is used to hold liquids while heating in the bunsen burner.

Question 42
42.

This tool is used to move beakers when the beaker is hot.

Question 43
43.

This a good tool for stirring solutions.

Question 44
44.

It is ok to use the same pipette in multiple different solutions during the lab.

Question 45
45.

These are good tools for getting a small amount of chemical out of the stock bottle.

Question 46
46.
Question 47
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Question 48
48.
Question 49
49.
Question 50
50.
Question 51
51.
Question 52
52.
Question 53
53.
Energy has neither been created or destroyed
There is the same amount of atoms on both side of the equation
The law of conservation of mass
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