Unit 2: Sig Figs and Peridoic Table

Question 1

Precision

Answer 1

How close a series of measurements is to each other

Question 2

_____=correct

Answer 2

Accuracy

Question 3

_____=consistent

Answer 3

Precision

Question 4

How to find percent error

Answer 4

|exp.- accepted| / accepted x 100

Question 5

Order of measurement units

Answer 5

M_ KHDBDCm _ (u thing)_ _n

Question 6

Common properties of Metals

Answer 6

Solid 
Good at losing electrons 
High density and melting point 
Most elements on the periodic table are this 
Mostly solids at room temperature

Question 7

Properties of Alkali Metals

Answer 7

Very reactive
In group 1
Don’t occur often in nature
Form +1 ions

Question 8

How many valence electrons does Alkali metals have?

Answer 8

1

Question 9

Properties of alkaline earth metals

Answer 9

Low density
Very reactive
Form +2 ions

Question 10

Number of valence electrons in Alkaline Earth Metals

Answer 10

2

Question 11

Properties of Halogens

Answer 11

Very reactive
Gains electrons
Form -1 ions
Group 17

Question 12

Number of valence electrons for Halogens

Answer 12

7 valence electrons

Question 13

Accuracy

Answer 13

How close a measurement is to the accepted value

Question 14

Properties of Noble Gases

Answer 14

Group 18 of periodic table 
Six noble gases
Oxidation # is 0
Don't form ions 
Colorless and non-flammable

Question 15

Number of valence electrons for Noble Gases

Answer 15

8(max. Number of valence electrons)

Question 16

Properties of transition metals

Answer 16

High melting point

Less reactive than alkali metals

Question 17

Properties of rare earth metals?

Answer 17

Occur naturally
Radioactive
High luster

Question 18

Common properties of Metalloids

Answer 18

Non-metals that when mixed with metal form an alloy, has a mix of properties from metals and non-metals

Question 19

Common properties of Non-metals

Answer 19

Good at gaining electrons
Bad at losing them 
Gas at room temperature 
Brittle
Poor conductors