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Flashcards in Chemistry Deck (135)
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0

* Kilo (k)

10³

1

Giga (G)

10⁹

2

Mega (M)

10⁶

3

Hecto (h)

10²

4

Deca (da)

10¹

5

Deci (d)

10⁻¹

6

* Centi (c)

10⁻²

7

* Milli (m)

10⁻³

8

Micro (um)

10⁻⁶

9

Nano (n)

10⁻⁹

10

Pico (p)

10⁻¹²

11

Getting the correct number of sig figs when adding or subtracting

Must have the same decimal places as the least certain # used in question

11 + 9.2 = 20.2

12

Getting the correct number of sig figs when multiplying or dividing

Must have the same # of sig figs as the factor with the least # of sig figs

2.89 x 4.01 = 11.6

13

Density formula

Density = mass/volume

Draw your circle with a T in the middle. Then it is M on top of T, then d to the left and v to the right (mountains over deep valleys)

14

Metals are characterized by

Malleability, ductility (molded/shaped),
Luster, conductivity and their ability to assume a (+) electric charge

15

Non Metals tend to be:

Brittle, dull, non-conductive and assume negative charges or remain neutral

16

As you move left along a period (or down a group) the metallic properties generally

Increase.
Metallic properties increase going left along a period or down a group

17

Why is hydrogen in group 1 and 17?

Because it may behave as metallic or non-metallic depending on the circumstance

18

Definition of Atomic number:

Number of protons in the nucleus

19

How are the elements arranged by what?

By their atomic number (number of protons)

20

Definition of Atomic Mass:

Number of protons and neutrons

21

The Alkali Metals are in what group?

Group 1

22

The Alkaline earth metals are in what group?

Group 2

23

The halogens are in what group?

Group 17

24

The noble gases are in what group?

Group 18

25

What is the combining capacity of group one (alkali metals)

+1

26

What is the combining capacity of group 2 (alkaline earth metals)

+2

27

What is the combining capacity of group 3 elements

+3

28

What is the combining capacity of group 13 elements

-3 (except Tl, it can be +1 as well)

29

What is the combining capacity of group 15 elements

-3