q.wekvn

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

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 / Family

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

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

Question 8

Atomic Mass

Answer 8

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

Question 9

Conductor

Answer 9

A material that allows things to flow

Question 10

Metal

Answer 10

elements that are good conductors of heat and electric current

Question 11

Nonmetal

Answer 11

elements that are poor conductors of heat and electric current

Question 12

Metalloid

Answer 12

Metalloid
elements with properties that fall between those of metals and nonmetals

Question 13

Noble Gas

Answer 13

Elements in group 18, stable and unreactive

Question 14

Proton

Answer 14

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

Question 15

Neutron

Answer 15

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

Question 16

Electron

Answer 16

A particle with a negative charge, same amount as 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

a force of attraction between atoms to make them more stable

Question 20

Ion

Answer 20

when atoms transfer electrons and become charged particles

Question 21

Ionic Bond

Answer 21

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

Question 22

Covalent Bond

Answer 22

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

Question 23

Chemical Formula

Answer 23

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

Question 24

Chemical Equation

Answer 24

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