periodic table

Question 1

Describe 3 models of an electron

Answer 1

Dalton’s model: was like a bowling ball. That everything was one.
Bohr’s model: looked like moons orbiting a plant. That electrons were in a specif order
Thomson Model : a scoop of chocolate chip ice cream That the electrons were scatted out in a one proton.
Cloud model: that had a proton sounded by a cloud of electrons

Question 2

what is the symbol for protons

Answer 2

p+

Question 3

what is a symbol for electrons

Answer 3

e-

Question 4

what is a symbol for neutrons

Answer 4

n

Question 5

how many periods are in the periodic table

Answer 5

7

Question 6

how many groups are in the periodic table

Answer 6

18

Question 7

who developed the first periodic table

Answer 7

Dmitri Mendeleev

Question 8

what is this called: 15

Answer 8

atomic number

Question 9

what is this called: p

Answer 9

symbol

Question 10

what is this called: 30.974

Answer 10

atomic mass

Question 11

what is this called: phosphorus

Answer 11

name

Question 12

name five groups

Answer 12

• Boron family
• Oxygen family
• nitrogen family
• carbon family
• transition metals

Question 13

Name one element from 5 groups

Answer 13

boron - boron family
oxygen - oxygen family
nitrogen- nitrogen family
carbon - carbon family
gold - transition metals

Question 14

what is a valence electron

Answer 14

a valence electron is a the elctron with the highest energy

Question 15

where is the valence electron

Answer 15

you can find it on the outer most shell

Question 16

3 properties of metal

Answer 16

malleability , ductility, conductivity

Question 17

what is a melalliod

Answer 17

a melilliod have some properties of metals and nonmetals. They are soild at room temperature, but are also brittle hard and some what reactive

Question 18

Name 2 melalliods

Answer 18

silicon and boron