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Chemistry > Introduction > Flashcards

Introduction Flashcards

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1
Q

What is wrong with this dot diagram?

A

The dots should be spread out around the diagram before pairing.

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2
Q

How many groups are there?

A

There are 18 groups

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2
Q

Put the following elements in order of lowest atomic mass to greatest atomic mass:

Sulfur (S)

Copper (Cu)

Francium (Fr)

Neon (Ne)

A

Neon

Sulfur

Copper

Francium

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3
Q

Element

A

the simplest form of pure matter

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4
Q

Weight

A

the amount of gravitational force on an object’s mass

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5
Q

What is the volume of a block that has a height of 60cm, width of 30cm, and length of 25.6cm? (V=l*w*h) What is the volume in mL? (cm3 = 1mL)

A

V = 60cm * 30cm * 25.6cm V= 46,080 cm3 Since 1 cm3 = 1 ml then 46,080 cm3 = 46,080 ml

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6
Q

If a box weighs 200lbs on Earth what is the weight of the box in Kg? (1lb= 0.45Kg) What is the mass of the box? (w=m*g; g=9.18)

A

200lbs I 0.45kg I = 90 kg 1 1 lb 90kg = m * 9.18 m= 9.80 kg

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7
Q

Volume

A

The amount of space an object takes up

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7
Q

An object has a density of 36g/ cm3 and a mass of 9g. What is the object’s volume?

A

36g/ cm3 = 9g/V V= .25 cm3

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7
Q

What were the 4 main points of Dalton’s atomic theory?

A

1) All elements are made from atoms 2) Atoms of the same element are the same. Atoms of different elements are different. 3) Atoms of one element cannot be changed into another element 4) Compounds have specific ratios of atoms.

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7
Q

What is the name of group 1? What are the properties?

A

Group one is the Alkali Metals : they are soft and shiny metals that need to lose one valence electron. They are highly reactive.

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9
Q

Atomic mass

A

the number or protons + the number of neutrons

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9
Q

What part of the atom did Rutherford discover?

A

Rutherford determined there was a nucleus in the atom with space between it and the electrons, rather than a solid sphere.

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10
Q

What is the name of group 18? What are the properties?

A

Group 18 is Noble gases: do not react, colorless, odorless gasses, have a full valence shell.

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11
Q

Atom

A

the simplest part of an element

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12
Q

Matter

A

anything that has mass and takes up space

14
Q

Atomic number

A

the number of protons in the nucleus

15
Q

How many periods are there in the periodic table?

A

There are 7 periods

15
Q

What is the name of groups 3-12? What are the properties?

A

Group 3-12 are the transitional Metals: hard shiny metals, anywhere from 1-3 valence electrons, good conductors, slow reactors.

17
Q

Valence electron

A

electrons on the outermost shell

18
Q
A
20
Q

Neutron

A

the neutron particle in the atom

21
Q

What is wrong with this dot diagram?

A

The dot diagram should only have 4 dots because there are 4 valence electrons

22
Q

Atom

A

the simplest part of an element

22
Q

Density

A

A measurement of the amount of matter in a specific volume

23
Q

Atomic number

A

the number of protons in the nucleus

24
Q

What did Bohr add to atomic theory?

A

Bohr added the electron shells and energy levels.

25
Q

Matter

A

anything that has mass and takes up space

26
Q

What is the name of group 17? What are the properties?

A

Group 17 is the halogens: very reactive, need to gain one electron, mostly gases

28
Q

Proton

A

positive part of the atom

29
Q

What is the difference between mass and weight?

A

Weight is a measurement of the force of gravity on an object while mass is the actual amount of matter in that object.

30
Q

Fill in the parts of the periodic tile and say what information it gives you

A
33
Q

Electron

A

negatively charge part of the atom

34
Q

How many valence electrons does magnesium (Mg) have? Silicon (Si)? Krypton (Kr)? Aluminum (Al)? Beryllium (Be)? * Use a Periodic Table

A

Mg = 2 valence Si= 4 valence Kr = 8 valence Al = 3 valence Be = 2 valence

35
Q

What was Thompson’s concept of the atom?

A

Thompson believe that the atom was a solid positively charge sphere that had negative electrons embedded in it.

36
Q

Draw the dot diagrams for

Mg

Si

Kr

Al

Be

A
37
Q

Mass

A

the amount of matter in an object

38
Q

What is the name of group 2? What are the properties?

A

Group 2 is the Alkaline Metals: they are not as reactive as group 1, have 2 valence electrons to lose, and are hard and shiny metals

39
Q

Element

A

the simplest form of pure matter

Chemistry (5 decks)

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