Science

Question 1

John Dalton

Answer 1

Billiard Ball, Solid Sphere

Question 2

Presence of electrons in the positive sphere

Answer 2

Plum Pudding Model

Question 3

J.J Thompson

Answer 3

Plum Pudding Model

Question 4

Nuclear at the Center

Answer 4

Nuclear Model

Question 5

Ernest Rutherford

Answer 5

Electrons move around the nucleus

Question 6

Nucleus contains protons

Answer 6

Ernest Rutherford

Question 7

Electrons move around the nucleus in fixed CIRCULAR ORBITS are called

Answer 7

Energy Levels

Question 8

Planetary Model

Answer 8

Niels Bohr

Question 9

Which model Failed to explain atoms

Answer 9

Quantum Mechanical Model

Question 10

Electrons are most likely found in regions called orbitals

Answer 10

Shrodinger

Question 11

Electrons are described by _ quantum numbers

Answer 11

4

Question 12

People who helped Schrodinger are

Answer 12

Planck, Heisenberg, De Broglie, Einstein

Question 13

REGIONS CALLED SUBSHELLS ORBITALS

Answer 13

Electron

Question 14

How many sublevels are in the 3rd energy level?

Answer 14

3

Question 15

Total number of orbitals in the second energy level

Answer 15

4

Question 16

Maximum number of electrons in the 4th energy level

Answer 16

32

Question 17

Must be filled first before pairing takes place

Answer 17

Hund’s Rule of Multiplicity

Question 18

States that each orbital only two could fit

Answer 18

Pauli’s Exclusion Principle

Question 19

Which is not a principle used in writing electron configuration

Answer 19

Uncertainty Principle

Question 20

What element would likely form an ionic bound?

Answer 20

SI and F

Question 21

NOT a property of an ionic compound

Answer 21

Crystalline Solid

Question 22

Why do atoms react with one another to form chemical bonds?

Answer 22

To produce ions

Question 23

What kind of force is present in ionic bond?

Answer 23

Electrostatic force

Question 24

Lithium is in group 1 of the periodic table, what will be it’s charge?

Answer 24

+1

Question 25

According to the Octet Rule, atoms of elements react with each other in order to attain _ electrons in their outermost energy level or shell

Answer 25

8

Question 26

What kind of elements form Ionic Bonds?

Answer 26

Metal and Nonmental

Question 27

When a magnesium burns in oxygen, it produces MgO. Use the Ionic formula to name the compound produced.

Answer 27

Magnesium Oxide

Question 28

Calcium bonds with Chlorine. What will be the formula of compound?

Answer 28

CaCI2

Question 29

States that electrons occupy the lowest energy level before going to a higher energy level?

Answer 29

Aufbau Principle

Question 30

To what does the symbol “n” in the Bohr Theory of atomic structure refer?

Answer 30

Energy level

Question 31

Based on Rutherford’s Model of an atom, which subatomic particles are present in nucleus of an atom?

Answer 31

Proton

Question 32

Which is a limitation of Rutherford’s atomic model?

Answer 32

It explains that the center of the atom is the nucleus and the atom is mostly empty space.

Question 33

Nitrogen (N) belongs to family 5A and it is diatomic (exists as two atoms). How many non polar covalent bonds will there be in N2 molecule?

Answer 33

3

Question 34

Which is a property of a covalent compound?

Answer 34

It does NOT dissolve in water.