First Exam

Question 1

What is the definition of measurement?

Answer 1

A number with an attached unit found using an instrument

Question 2

What is a measurement based on?

Answer 2

Personal judgment and instrument precision

Question 3

What is a non-zero digit?

Answer 3

Any digit that isn’t a zero

Always significant

Question 4

What is a zero “sandwich”?

Answer 4

Zeros that are between other numbers

Always significant

Question 5

What is a leading zero?

Answer 5

Zeros that come before a number

Never significant

Question 6

What is a trailing zero?

Answer 6

Zeros that come at the end of the number (depends on decimals)
Decimal - 1.60 - significant
No decimal - 5000 - not significant

Question 7

How many sig figs: 354.89

Answer 7

5

Question 8

How many sig figs: 102.202

Answer 8

6

Question 9

How many sig figs: 3500

Answer 9

2

Question 10

How many sig figs: 0.04560

Answer 10

4

Question 11

Round the number to 3 sig figs: 0.009794012

Answer 11

0.00979

Question 12

Round the number to 3 sig figs: 234.56

Answer 12

235

Question 13

Convert the following into scientific notation: 4560

Answer 13

4.56 x 10^3

Question 14

What scientist is credited with creating the first periodic table?

Answer 14

Dmitri Mendeleev

Question 15

What are the horizontal rows of the periodic table called?

Answer 15

Periods

Question 16

What are the vertical columns of the periodic table called?

Answer 16

Groups

Question 17

What specific family name is given to the elements in Group IA

Answer 17

Alkali metals

Question 18

What specific family name is given to the elements in Group IIA

Answer 18

Alkaline earth metals

Question 19

What specific family name is given to the elements in Groups IIIB to IIB

Answer 19

Transition metals

Question 20

What specific family name is given to the elements in the two rows of elements at the bottom of the periodic table?

Answer 20

Inner transition metals

Question 21

What specific family name is given to the elements in Group VIIA

Answer 21

Halogens

Question 22

What specific family name is given to the elements in Group VIIIA

Answer 22

Noble gases

Question 23

Where are the naturally occurring elements located on the periodic table?

Answer 23

Elements 1-92, except for #43 & 61

Question 24

What is another name for the manmade elements?

Answer 24

Synthetic

Question 25

What are the only two synthetic elements between 1 and 92?

Answer 25

Technetium and Promethium

Question 26

How can you tell if an element is radioactive?

Answer 26

The element has parentheses around their atomic mass

Question 27

What is the only nonmetal to the left of the zig-zag line?

Answer 27

Hydrogen

Question 28

What is the term for elements that exist in pairs?

Answer 28

Diatomic elements

Question 29

Name the diatomic elements

Answer 29

Hydrogen, Oxygen, Nitrogen, Fluorine, Chlorine, Bromine, Iodine

Question 30

Where are the metals found on the periodic table?

Answer 30

To the left of the zig-zag line

Question 31

List four general properties of metals

Answer 31

Good conductors, malleable, ductile, high melting points

Question 32

Where are the nonmetals found on the periodic table?

Answer 32

Right of the zig-zag line (except for Hydrogen)

Question 33

List four general properties of nonmetals found on the periodic table

Answer 33

Dull, good insulators, usually brittle, lower melting points

Question 34

What are the elements that have some properties of metals and some properties of nonmetals called?

Answer 34

Metalloids

Question 35

Where are the metalloids located on the periodic table?

Answer 35

They touch the zig-zag line (except for Al)

Question 36

Name the metalloids

Answer 36

Boron, Silicon, Arsenic, Tellurium, Astatine, Germanium, Antimony

Question 37

Which particles compose the nucleus?

Answer 37

Protons and neutrons

Question 38

Where are the electrons located in an atom?

Answer 38

Outside the nucleus

Question 39

Which subatomic particle is equal to the atomic number?

Answer 39

Protons

Question 40

Which subatomic particle determines isotopes?

Answer 40

Neutrons

Question 41

Which subatomic particles are the same size?

Answer 41

Neutrons and protons

Question 42

Which subatomic particle has a negative charge?

Answer 42

Electron

Question 43

What is the mass number equal to?

Answer 43

of protons and # of electrons

Question 44

Define an isotope:

Answer 44

Atoms of the SAME ELEMENT that have different MASS NUMBERS

Question 45

What is an ion?

Answer 45

An atom with an electrical charge

Question 46

What is the atomic mass of an element?

Answer 46

The "weighted average" of the different isotopes

Question 47

Where is the mass number located on the periodic table?

Answer 47

Not found on the table

Question 48

What are the units for atomic mass?

Answer 48

amu (atomic mass units)