Atomic Structure And The Periodic Table

Front 1

What are periods?

Back 1

horizontal rows of elements, elements in these are in different groups with different properties

Front 2

What is the Average Atomic Mass?

Back 2

Average of masses of all isotopes of that element that occur in nature

Front 3

What is a Neutron?
Where is it located?

Back 3

- particle that has 1 amu and no electric charge

- nucleaus

Front 4

What is an Atom?

Back 4

smallest particle of any element, that has the properties of that element and has no charge (neutral)

Front 5

What are Groups?

Back 5

- another name for families of elements
- the verticle columns of elements
- have elements with similar properties and chemical reactions

Front 6

Where are the Transition Elements?

Back 6

elements in middle of periodic table, groups 3 - 12

Front 7

What does the Atomic Number represent?

Back 7

# of protons in an atom

Front 8

What is a Proton?
Where is it located?

Back 8

- Particle that has 1 amu and a charge of +1

- nucleus

Front 9

Where are the Noble Gases?

Back 9

elements of group 18 in this family

Front 10

What is a Nucleus?

Back 10

- center of an atom
- location of protons and neutrons
- very dense
- positive electric charge
- almost all mass of atom located in this

Front 11

What does the Mass Number represent?

Back 11

Total count of the neutrons and protons in an atom

Front 12

What are Isotopes?

Back 12

Atoms of the same element with different numbers of neutrons.

Front 13

Where are METALS found on the periodic table?

Back 13

elements found on left side of periodic table

Front 14

Where are Metalloids located on the periodic table?

Back 14

elements bordering line dividing metals and nonmetals and have some properties of both metals and nonmetals

Front 15

What is an Electron?

Back 15

particles that move about the nucleus forming a cloud of negative charge, move at very quick speed, found in different energy levels, grouped in pairs

Front 16

What are Nonmetals?

Back 16

elements on right side of periodic table, elements that usually have five or more electrons in outer energy level

Front 17

What is an Electron Cloud?

Back 17

region around the nucleus occupied by electrons with negative electric charge

Front 18

What is a Periodic Table?

Back 18

chart that shows the classification of elements

Front 19

What is an Element?

Back 19

substance that consists of only one kind of atom, cannot be broken down into simpler substances by chemical change

Front 20

Why is Hydrogen unique?

Back 20

lightest and most abundant element in universe

Front 21

What is Copper used for and why?

Back 21

electrical wire, because it is a good conductor.

Front 22

What is the Element Symbol?

Back 22

shorthand way to write the name of an element, sometimes taken from Latin name of element

Front 23

What is Electromagnetic Force?

Back 23

force of attraction (opposite charges) or repulsion (like charges) that keeps the negative electrons near the positive nucleus in an atom

Front 24

What is the Nuclear Force?

Back 24

overcomes electromagnetic force of repulsion between the positive protons in the nucleus (it keeps the nucleus together)

Front 25

What determines the type of element?

Back 25

# of protons in nucleus of atom

Front 26

Which electrons have the most energy?

Back 26

The electrons that are the farthest from the nucleus.

Front 27

What is the amount of Electrons each energy level can hold?

Back 27

1st- 2, 2nd- 8, 3rd- 18

Front 28

How can the # of neutrons in an atom be found?

Back 28

by subtracting atomic # from mass #

Front 29

How is the periodic table arranged?

Back 29

By increasing atomic number.

Front 30

What does the Period # represent?

Back 30

the number of energy levels in an atom

Front 31

What are the characteristics Metals?

Back 31

- good heat and electricity conductors
- ductile ( bendable )
- shiny

Front 32

What are Valence Electrons?

Back 32

electrons in outermost energy level