atoms and formulas

Question 1

what is an atom

Answer 1

basic building blocks

Question 2

what is the atomic structure

Answer 2

nucleus in a centre which consists of neutrons and protons. electrons within shells orbit nucleus

Question 3

relative mass and charge of proton

Answer 3

RM: 1
RC: +1

Question 4

relative mass and charge of neutron

Answer 4

RM: 1
RC: 0

Question 5

relative mass and charge of electron

Answer 5

RM: 1/2000
RC: -1

Question 6

what is an isotope?

Answer 6

atoms of the same element that has the same number of protons but different number neutrons.

Question 7

what letter presents the atomic number of an element

Answer 7

Z

Question 8

what letter represents the mass number of an element

Answer 8

A

Question 9

what does the group number of an element determine about an element

Answer 9

group number determines the outmost electrons

Question 10

how to calculate relative atomic mass

Answer 10

(abundance 1(%) x mass no1)+(abundance 2(%) x mass no2)

Question 11

rutherfords model

Question 12

bohrs model

Question 13

what is the formula for:
nitrate
carbonate
sulfate
hydroxide
ammonium
zinc
silver

Answer 13

NO3 –
CO3 2-
SO4 2–
OH –
NH4 +
Zn 2+
Ag +

Question 14

what is a mole

Answer 14

amount of subastance
represents avagadros constant (6.02x10^23)

Question 15

what is molar mass

Answer 15

mass per mole, units g mol–1

Question 16

what is molar gas volume

Answer 16

gas volume per mole,
units dm3 mol–1

Question 17

how to calculate mole m

Answer 17

mass=Mrmol

Question 18

how to calculate mole c

Answer 18

concentration x volume

Question 19

how to calculate mole

Answer 19

given volume/ 24dm^3