Science T1

Question 1

What model did Ernest Rutherford make?

Answer 1

Nuclear model

Question 2

What model did John dalton make?

Answer 2

Solid sphere model

Question 3

What model did JJ Thomson make?

Answer 3

Plum pudding model

Question 4

What model did Niles Bohr make?

Answer 4

Planetary model

Question 5

What model did James chadwick make?

Answer 5

Atomic model

Question 6

What charge to electrons give

Answer 6

negative

Question 7

What are electrons equal to

Answer 7

protons

Question 8

What charge do protons give

Answer 8

positive

Question 9

What does the atomic number equal?

Answer 9

number of protons

Question 10

what charge do neutrons give

Answer 10

no charge (neutral)

Question 11

how do you find the number of neutrons?

Answer 11

atomic mass-atomic number

Question 12

what is the symbol for glucose

Answer 12

C6H12O6

Question 13

What is the symbol for ammonia

Answer 13

NH3

Question 14

symbol for magnesium oxide

Answer 14

Mgo

Question 15

symbol for sodium chloride

Answer 15

NaCl

Question 16

symbol for carbon monoxide

Answer 16

CO

Question 17

Symbol for methane

Answer 17

Ch4

Question 18

symbol for cabon dioxide

Answer 18

CO2

Question 19

Symbol for oxygen

Answer 19

O2

Question 20

What does H2 mean

Answer 20

hydrogen

Question 21

is h2o ionic or covalent

Answer 21

covalent

Question 22

ionic meaning

Answer 22

metal & non-metal

Question 23

covalent meaning

Answer 23

only non-metals

Question 24

what is the law of conservation of mass

Answer 24

The law of conservation of mass says that matter cannot be created or destroyed in a closed system. The total mass stays the same before and after a reaction. Mass is just rearranged, not lost or created

Question 25

what is an example of the law of conservation of mass

Answer 25

If you mix vinegar and baking soda, they react and form bubbles (gas), but the total mass of everything stays the same.

Question 26

What is a diatomic molecule, and can you name two examples?

Answer 26

A diatomic molecule has two atoms. Examples: O₂ (oxygen), H₂ (hydrogen).

Question 27

Which elements are in Group 18 of the periodic table?

Answer 27

Group 18 elements are noble gases: helium (He), neon (Ne), argon (Ar)

Question 28

Give 3 examples of covalent bonds on the periodic table

Answer 28

Carbon dioxide, methane, ammonia

Question 29

Give 3 examples of ionic bonds on the periodic table

Answer 29

sodium chloride, magnesium oxide, lithium fluoride

Question 30

what is a compound and give an example

Answer 30

A compound is a substance made of two or more different elements that are chemically joined together. The elements in a compound are bonded in a fixed ratio. For example, water (H₂O) is a compound made of hydrogen and oxygen atoms joined together

Question 31

what is an element and give 1 example

Answer 31

An element is a pure substance made up of only one type of atom. An example of an element is oxygen (O).

Question 32

What is a lattice and give an example

Answer 32

A lattice is a repeating pattern of particles (atoms, ions, or molecules) arranged in a solid. Example: Salt (NaCl) has a lattice of sodium and chloride ions

Question 33

How are atoms arranged?

Answer 33

Atoms are arranged in energy levels or shells around the nucleus. The electron arrangement in atoms generally follows the 2, 8, 8, 2

Question 34

what is the nucleus and what is found in it?

Answer 34

The nucleus is the central part of an atom. Inside the nucleus, you'll find two types of particles: Protons: Positively charged particles. Neutrons: Particles with no charge (neutral).

Question 35

Where are neutrons electrons located on an atom?

Answer 35

Electrons are located in energy levels or shells that surround the nucleus of the atom. These shells are arranged at different distances from the nucleus.

Question 36

What is the top number on an element called?

Answer 36

atomic number

Question 37

what is the bottom number called

Answer 37

atomic mass

Question 38

what is in a substance

Answer 38

A substance is made up of atoms or molecules