C1 atomic structure

Question 1

elements

Answer 1

contain only one type of atom

Question 2

compound

Answer 2

contain two or more elements chemically bonded together

Question 3

law of conservation of mass

Answer 3

total mass of products formed in a reaction is equal to the total mass of the reactants

Question 4

mixture

Answer 4

two or more substances that are not chemically combined

Question 5

fractional distillation

Answer 5

separates miscible liquids
uses a fractionating column
possible due to the different boiling points of liquids in the mixture

Question 6

paper chromatography

Answer 6

separates mixtures of substances dissolved in a solvent

due to the different solubilities in the solvent used

Question 7

protons

Answer 7

relative charge of +1

relative mass 1

Question 8

neutrons

Answer 8

rel charge 0

rel mas 1

Question 9

electrons

Answer 9

rel charge -1

rel mass almost 0

Question 10

atomic number

Answer 10

number of protons

(number of electrons)

Question 11

mass number

Answer 11

number of protons + number of neutrons

Question 12

isotope

Answer 12

atom of the same element with different number of neutrons .
chemical properties same
physical properties can change

Question 13

energy shells

Answer 13

2,8,8

number of electrons in outer shell determine how element reacts