Term 1 flashcards

What model did JJ Thompson suggest for the atom?

The plum pudding model

What did Ernest Rutherford suggest?

That the atom had a positive nucleus with negative electrons around it

What did James Chadwick discover?

Neutrons

What is the relative charge, mass and location of an Electron?

-1, 1/1840 and in the shells

What is the charge, relative mass and location of the proton?

+1, 1 and the nucleus

What is the charge, relative mass and location of the neutron?

0, 1 and in the nucleus

What is a period on the periodic table?

A row

What is a group on a periodic table?

A column

What is an Ion?

A charged particle formed when an atom gains or loses electrons

What is a negative Ion called. E.g. chlorine -

An Anion

What is a positive Ion called? E.g. Na +

A Cation

Will an atom in group 3 form a negative or positive Ion?

Positive

Will a group 7 atom make a positive or negative Ion?

Negative

Why are Ions formed?

Because the elements “want” to get a full outer shell and become stable

What is a shared pair of electrons called?

A covalent bond

What do you call two or more atoms covalently bonded togethor?

A molecule

What is an Ionic bond?

The strong, electrostatic attraction between oppositely charged Ions