Chemistry Review - Quiz 3 Flashcards Preview

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Flashcards in Chemistry Review - Quiz 3 Deck (55)
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1

What is Chemistry

Study of matter and its changes

2

What is Matter?

Anything that has mass and occupies space

3

What are Atoms?

Building block of matter. 

Made of Protons, Neutrons, and Electrons

4

Protons

Positive Charge

Atomic # = # of Protons

5

Neutrons

Neutral Charge

1 amu

6

Electrons

Negative Charge

7

Ions

Atoms/groups of atoms bonded together with a net charge

Cations: +

Anions: -

8

What are compounds

More than one kind of atom in a fixed ratio by mass

9

Molecules

Groups of atoms bonded together by covalent bonds

Neutral Charge

10

Ionic Compounds

Has both + and - charged ions

Attracted by charge and are not molecules

11

Physical Change

No change in chemical makeup

EX: melting ice

12

Chemical Change

Always makes a chemically different substance

Ex: 2H2O --> 2H2 + O2

13

Physical Property

When you look at it and say what it is

Intensive: Color

Extensive: Size (Volume)

14

What are substances?

Pure materials that can't be physically separated into simpler components

Chemical and Physical properties are uniform

Compound or Element

15

Mixtures

2 or More Pure Substaances

  • Can separate mixture into simpler substances

16

Homogenous

Uniform in physical and chemical properties

EX: Normal saline

17

Heterogenous

Distinct phase boundaries where chemical and/or physical properties change

Ex: Vomit

18

Where are protons and neutrons located?

Nucleus

19

Where are electrons located

Around the nucleus in cloud-like orbitals

20

What has wave-like properties rather than geometric properties?

Atomic Structures

21

All atoms have neutrons except for ?

Hydrogen

22

What determines the atom's identity?

The Atomic Number = # of Protons

23

How do you get the Mass Number?

Neutrons + Atomic Number

24

What are isotopes?

Same Atomic Number, Different Mass Number

(diff # of neutrons)

25

What is Periodic Law

Properties of elements are periodic fxns of their atomic #

26

On periodic table, what are the verticle columns?

Groups/Families

Have similar chemical and physical properties

27

On the Periodic table, what are the rows

Periods

Adding e- to energy levels, e- shells

Element at the end of a period has a full e- shell

28

Anions

Nearly full e- shell --> accepts e-

29

Cation

Nearly empty e- shell --> release e-

30

Metals

Mostly on Left Side

Shiny, Ductile, Malleable, Good electric conductors

React to form Cations