science 4 Periodic Flash Cards

Question 1

Periodic Table

Answer 1

An arrangement of elements in columns based on a set of properties that repeat from row to row.

Question 2

Mendeleev

Answer 2

A chemist who developed the periodic table and organized elements by their properties while leaving empty spaces for more elements to be discovered.

Question 3

Element

Answer 3

A pure substance that cannot be broken down.

Question 4

Period

Answer 4

A row going across on the Periodic Table.

Question 5

Group

Answer 5

A column going up and down on the Periodic Table.

Question 6

Periodic Law

Answer 6

The pattern of repeating properties down each group in the periodic table.

Question 7

Chemical Element Symbol

Answer 7

A one or two letter symbol that represents that name of an element
first letter is capital and potential second letter is lowercase.

Question 8

Atomic Number

Answer 8

number of protons in an element,
atomic is also equal to the number of electrons.

Question 9

Atomic Mass

Answer 9

The number of protons and neutrons in the nucleus center of an element.

Question 10

Conductor

Answer 10

A material that allows things to flow

Question 11

Metal

Answer 11

elements that are good conductors of heat and electric current

Question 12

Nonmetal

Answer 12

elements that are poor conductors of heat and electric current

Question 13

Metalloid

Answer 13

elements with properties that fall between those of metals and nonmetals

Question 14

Noble Gas

Answer 14

Elements in group 18, stable and unreactive

Question 15

proton

Answer 15

A particle with a positive charge, same amount as atomic number, this particle identifies the element

Question 16

Electron

Answer 16

A particle with a neutral charge, same amount as (atomic mass - atomic number)

Question 17

Valence Electron

Answer 17

Electrons on the outermost shell

Question 18

Orbital / Shell / Energy Level

Answer 18

Outer boundary of an atom, mostly empty space, each shell starting from the first shell can hold:
1st shell - 2 electrons
2nd shell - 8 electrons
3rd shell - 18 electrons
4th shell - 32 electrons

Question 19

Nucleus (in an atom

Answer 19

the center of an atom that contains neutrons and protons and therefore most of the mass

Question 20

Chemical Bond

Answer 20

a force of attraction between atoms to make them more stable

Question 21

Ion

Answer 21

when atoms transfer electrons and become charged particles

Question 22

Ionic Bond

Answer 22

the force of attraction that holds together positive and negative ions, a transfer of electrons

Question 23

Covalent Bond

Answer 23

A force of attraction that holds together two atoms and shares electrons

Question 24

Chemical Formula

Answer 24

shows the elements involved in that molecule and the number of atoms of each element

Question 25

}]Chemical Equation

Answer 25

Shows the molecules involved in a reaction
reactants show the ingredients and the products show the results