What is the atomic number?

the number of protons in the nucleus

What is the definition of a element

any compound that can't be broken down further

Some evidence a chemical reaction took place could be...

Color change, Heat change, precipitate or gas forms, Color stays the same, but heat increases

What is an emperical formula?

The simplest whole number version of a molecular formula.

What is the definition of Volume?

The amount of space that a substance or object takes up.

pure substance of 2+ diff. elements that are chem. combined

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CHEM H

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Simple Beginner Chemistry Questions

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Questions 19

Answers

1
Which of these are signs of a chemical reaction?
All of the above!
There is an increase in temperature!
There is a change in color!
There is a decrease in temperature!
2
How often do you make chemistry jokes?
Always.
Never.
Every other day.
Periodically.
3
What is the atomic number?
The number of electrons in the electron cloud
The number of neutrons in the nucleus
The number of protons in the electron cloud
the number of protons in the nucleus
4
What is the definition of a element
any substance that can be broken down further.
a compound that contains more than five elements.
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any compound that can't be broken down further
5
What is the unit for measuring mass?
grams
liter
Kelvin
meter
6
Homogeneous or heterogeneous?
Homogeneous
heterogeneous
7
Some evidence a chemical reaction took place could be...
Color change, Heat change, precipitate or gas forms
Substance is very still
Color stays the same, but heat increases
Substance stays the same, but you feel like something is different
8
Matter has physical properties that can be measured.
True
False
9
CHEMISTRY IS WHAT SUBJECT?
social studies
english
math
science
10
Homogeneous or Heterogeneous?
Heterogeneous
Homogeneous
11
What is an emperical formula?
less numbers n letters
letters n numbers
The simplest whole number version of a molecular formula.
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12
Anything that has mass and volume is
a substance
energy
matter
hot
13
Homogeneous and Heterogeneous?
Homogeneous
Heterogeneous
14
how many elements are on the periodic table
130
105
118
93
15
What is the definition of Volume?
The amount of space that a substance or object takes up.
A book forming a part of a work series.
How loud something is.
How much stuff there is.
16
what is compound?
pure substance of 5+ diff. elements that are chem. combined
pure substance of 2+ diff. elements that are chem. combined
pure substance of 4+ diff. elements that are chem. combined
pure substance of 3+ diff. elements that are chem. combined
17
Which of these is the correct formula for Density
m = Dv
D = mv
D = v/m
v = D/m
18
What example is NOT chemical reaction?
Glass breaking
Fireworks, baking a cake
Toast
Burning wood
19
What is the chemical symbol for Iron?
Ir
I
Ag
Fe

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