Introduction To Chemistry

 

What is an atom?

 

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 basic unit of matter

 

[image]

 This picture demonstrates three things.

What are they showing?

Hint: (3 __________ of _______)

 

 

 

3 states of matter

 

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What charge does a neutron have?

Where is a neutron located?

neutral or no charge particle

 

located in the nucleus of the atom

 

What is an electron?

 

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Where do you find an electron?

negatively charged particle

 

found outside the nucleus

in an orbital or energy level

 

What is a compound?

 

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a substance

formed by

combining

two or more elements

 

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The science that deals with the composition and properties of substances is known as …?

 

 

 

 

chemistry

 

 

 

What is an isotope?

 

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 atoms of the same element

that have

different number of neutrons

 

 

What are the

two main types

of chemical bonding?

 

covalent

and

ionic bonding

 

 

The type of bond

when two or more electrons are transferred from one atom

to another is called..??

 

 

ionic bond

 

 

A chemical bond that

shares electrons

is known as __________.

 

 

covalent bonding

 

[image]

 

 

A smalled unit

of a compound

is known as a …?

 

 

[image]

 

 molecule

 

 

 

What is a mixture?

 

material composed of

two or more elements or compounds that are physically mixed together,

but not chemically combined

 

An attraction

between molecules

of different substances

is known as…

 

 

 

 

adhesion

 

An attraction

between molecules

of the same substances

is known as….

 

 

 

 

cohesion

 

A mixture

of two or more substances

in which the molecules of

the substances are

evenly distributed is known as …?

 

[image]

 

solution

 

 

The universal solvent is ____________.

 

 

 

water

 

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A substance in which

a solute is dissolved

to form a solution

is known as ..?

 

 

 

 

solvent

 

A substance that is dissolved

in a solvent

to make a solution

is known as ..?

 

 

 

solute

 

 

What is a suspension?

 

[image]

 

 

 

A mixture of water and

nondissolved materials

 

 

Percent of hydroden

can be abbreviated as ….

 

 

 

 

pH

 

 

The pH scale ranges from

_____ to _____.

 

 

 

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0 to 14

 

In order to be considered neutral

on the pH scale,

you must have a pH of _________________.

 

exactly 7.0

 

 

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If you have a pH of 0 to 6.9999

on the pH scale,

you are considered a(n) _____________.

 

[image]

 

 

 

acid

If you are tomato juice

you would be considerded:

 

(acidic, neutral, or basic)

acid

 

[image]

 

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If you are considered pure water,

you are ___________.

(acidic, neutral, or basic)

 

 

 

 

neutral

 

 

If you have a pH of 10 (most soaps),

you are considered:

(acidic, neutral, or basic)

 

basic

 

[image]    

 

 

 How many atoms of hydrogen

are in a water molecule?

 

How many atoms of oxygen

are in a water molecule?

 

 

[image]

 

2 hydrogen atoms;

1 oxygen atom

 

 

 

What is an ion?

 

 

atom that has a

positive or negative charge

 

 

The outermost layer

of electrons is known as the ____________ electrons.

 

 

[image]

 

valence electrons

 

 

When doing the Bohr models,

how can you tell

how many valence electrons there are?

 

Do the model and see how many electrons

are in the outermost shell;

OR

refer to the column # in the periodic table

 

[image]

 

 

In the first energy level,

the maximum amount of electrons

allowed are ___________.

 

 

 

2 electrons

 

In the 100th energy level,

what is the

maximum amount of electrons

you can have?

 

 

8 electrons

 

In order to be

considered stable,

the element must….

 

have its outermost (valence) layer filled to capacity

 

1st level: 2 max

2nd level: 8 max

3rd level:  8 max

4th level: 8 max

etc.

 

 

What is the only element that

does not have any neutrons?

 

 

[image]

 

Hydrogen

 

 

Who created

the periodic table?

 

[image]

 

 

 

Dmitri Mendeleev

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The two subatomic particles

found within the nucleus

of an atom

are called the _____ and _____.

 

 

 

proton and neutron

[image]

 

 

Another term

for the atomic mass is….?

 

atomic weight

or

mass number

 

 

Define the term

atomic mass.

 

 

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the mass of the

protons and neutrons

 

 

                                                [image]

 

What is the

chemical symbol

for potassium?

 

 

 

 

K

(capital K)

 

 

How many protons

does carbon have?

 

 

[image]

 

 

 

6

 

What is the

element symbol

for mercury?

 

[image]

 

 

 

Hg

 

 

The chemical formula

of NaCl is a fancy name

for this item…

 

 

[image]

 

table salt

 

How many neutrons

does Scandium have?

 

(Hint: atomic # 21

atomic mass = 44.956)

 

Atomic mass – Atomic number =

# of neutrons

 

So….

 45-21 = 24 neutrons

 

 

What is the

element symbol for nickel?

 

 

 

Ni

[image]

 

 

If I go from a 4 to a 5 on the pH scale,

what times greater

is that concentration?

 

 

10 times

(for every jump I go 101)

 

 

If I go from a concentration of 10 to 12

on the pH scale,

what times greater is that concentration?

 

 

100 times greater

 

(I jumped 2 spaces,

so it is 102)

 

 

What type mixture is soda –

homogeneous

or heterogeneous?

 

 

[image]

 

homogeneous

(the same throughout)

 

 

[image]

Is burning a piece of paper,

a chemical or physical change?

 

 

 

chemical

 

(you can’t put it back together!)

True/False: There are 50 flashcards.

 

True/False: I got every one correct.

 

True/False: I have been studying for the exam.

 

True/False: Chemistry is fun!

 

True/False: I love my chemistry teacher!

 

 

 

If you answered “true”

for all of these questions,

then you are done!

;

;

What do I always need to bring

to a test/quiz?

;

;

[image]

A pencil!