atoms and period table

what do metals do to gain an empty outer shell?

metals always donate electrons to gain an empty outer shell to form position ions.

what do non- metals do to gain a full outer shell?

non-metals always accept electrons to gain a full outer shell. they can form negative ions.

what is the relative charge of protons, neutrons, and electrons?

protons have a +1 charge

neutrons have a 0 charge

electrons have a -1 charge

what is the relative mass of protons, neutrons, and electrons?

protons have a mass of 1

neutrons have a mass of 1

electrons have a mass of 0 (very small)

what is the order of the scientists that made the atomic Structure?

john Dalton, JJ Thomas, Ernest Rutherford, Neil Bohr, James Chadwick.

define isotopes

same element, different number of neutron

define element

contains only one type of atom

define compound

contains two or more types of atoms chemically bonded together

define mixture

substance made for elements and/for compounds not chemically bonded together

what are the names of the top and bottom on an elements on the period table

top is relative atomic mass

bottom is atomic number

define atomic number

the number of protons in the nucleus of an atom

describe group 1 elements including their name,reactive scale and their electrons.

group 1 is called alkali metals and they donate/lose 1 electrons to have an empty outer shell becoming positive ions. they are more reactive down the group.

describe group 7 elements including their name,reactive scale and their electrons.

group 7 is called halogens and they gain 1 electrons to have a full outer shell becoming negative ions. they are less reactive down the group and increase in boiling point down the group.

describe group 0 elements

group 0 is called noble gases. They are very reactive as they already have an empty outer shell.

what happens when an alkali metal react with water?

its produce metal hydroxide/ alkali and hydrogen gas

what happens when a halogens react with metal?

form a metal halide.

how was the period table originally ordered?

periodic table ordered according to their atomic ‘weight‘

who changes the period table

Dmitri Mendeleeve is based on properties and his table has gaps.