Chem test #2

Question 1

Who made the periodic table

Answer 1

Dimitri Mendeleev

Question 2

What are groups and periods

Answer 2

Groups are the columns and have the same amount of electrons in their valence shells. (Same groups usually have the simmilar properties)

Periods are the horizontal rows.

Question 3

What is Dimitri Mendeleev’s law

Answer 3

Elements arranged according to the value of their atomic weights present a clear periodicity of properties.

Question 4

Where are the metals located

Answer 4

To the left of the stair case (exept for hydrogen)

Question 5

Where are the non metals located

Answer 5

To the right of the stair case

Question 6

Where are metalloids located

Answer 6

Adjacent to the staircase/ on the staircase

Question 7

Where are the halogens located

Answer 7

In group 7a or 17 on the right next to the noble gasses

Question 8

Where are the Alkali metals located

Answer 8

The leftmost group

Question 9

Where are the Alkaline earth metals located

Answer 9

Group 2 or just right of the Alkali metals

Question 10

Where are the innertranstion metals located

Answer 10

In the middle, Starting in group 3 and ending in group 12.

Question 11

Where are the noble gasses

Answer 11

Rightmost group

Question 12

Properties of metals

Answer 12

Lustre: shiny, Hardness: ductile and malleable, Conductivity: Do concudct electricity, Reactivity: react with acids

Question 13

Properties of non metals

Answer 13

Lustre: dull, Hardness: brtittle, Conductivity:Do not concudct electricity, Reactivity: do not react with acid

Question 14

Properties of mealloids

Answer 14

Behave like metals and non-metals

Question 15

Patterns in the periodic table

Answer 15

Going up or down a column, elements are organized into groups which have similar chemical properties. Moving left or right within a row, the atoms trend smaller or larger in size, and their reactivities go up and down.

Question 16

What is the atomic number, atomic mass, AMU, and Standard atomic notation

Answer 16

Atomic number is the number of protons, Atomic mass is the relative weight which is the protons and newtrons weight added. AMU is atomic mass unit one proton in 1 amu one newtron is 1 amu and one electron is 1/2000 amu

Standard atomic notation is Atomic mass is on the top, the atomic symbol in the middle and the atomic number on the bottom.

Question 17

Ion name for positve and negitive ions

Answer 17

Anion is negitive as there is a “n in it”

Cation is a positive ion

YOU ONLY CHANGE THE AMOUNT OF ELECTRONS

Question 18

How do atoms combine

Answer 18

Positve and negitive attract

Question 19

Order of Scientists in theyroys of the atom

Answer 19

1) John Dalton proposed the
first atomic theory:
“billiard ball model”
*All matter is made up of
atoms
*Atoms cannot be divided
*All atoms of the same
element are identical
*Atoms of different
elements are different
(Found all atoms contain sperical subatomic particles)

2)J. J.
Thomson
*Cathode Experiments showed:
*There are negatively charged
particles called electrons, which
have very little mass
*Atoms are neutral
*There has to be something that is
positive with lots of mass
*Positively-charged “soup”
PLUM PUDDING MODEL
(Discoverd electrons)

3) * Ernest Rutherford proposed:
*The raisin bun model was wrong
*Atoms was mostly made of empty space
*Have a very dense core of protons
called the nucleus
*Proton was 2000 times heavier than
electron
GOLD FOIL EXPEREMENT
(Disocved the newcleus and that there are protons in it)

4)Along came Niels
Bohr!
*He suggested a
change to
Rutherford’s model
*Electrons are not
“just” outside the
nucleus
*They are circling it
with the right speed
*Similar to planets
orbiting the Sun
Bhor- RUTHORFORD MODEL
(Discovered that electrons are in orbitals with different energy levels)

4.5)?*James Chadwick, in
1932, identified the
uncharged particle in
the nucleus
*Mass almost identical to
proton
*Called neutron
(DISCOVERD NEWTRON)