atoms and compounds

Question 1

what is group 1 called

Answer 1

alkali metals

Question 2

what is group 2 called

Answer 2

the transition metals

Question 3

what is group 7 called

Answer 3

halogens

Question 4

what is group 8 called

Answer 4

noble gases

Question 5

what is a shared propery of the alkali metals

Answer 5

stored under oil (out of air contact) - extremley reactive- react violentley with water to produce alkaline solution

Question 6

what is an isotope

Answer 6

same atomic number (protons) different mass number (nuetrons)

Question 7

what is the atomic number

Answer 7

number of protons (=no. of electrons)

Question 8

what is the relative atomic mass?

Answer 8

the average mass of all isoptopes

Question 9

what is the mass number

Answer 9

no. of protons + nuetrons

Question 10

what is nuclide notation

Answer 10

shows element symbol with mass number (top) and atomic number (bottom)
-can also show ion charge

Question 11

what is a period (periotic table)

Answer 11

a row (left to right)

Question 12

what is a group

Answer 12

a cloumn

Question 13

how do you figure out a molecular formula when given the elements

Answer 13

symbol
valency
swap
divide