atoms & ions etc

Question 1

elements

Answer 1

made up of only 1 atom and cannot be broken down

Question 2

molecules

Answer 2

2 or more atoms bonded.

Question 3

compound

Answer 3

consists of 2 or more different atoms bound together

Question 4

atoms

Answer 4

protons neutrons and electrons

Question 5

protons

Answer 5

found in nucleus and has a positive charge

Question 6

neutrons

Answer 6

: found in nucleus and has no charge

Question 7

electrons

Answer 7

: found in nucleus and has negative charge

Question 8

how do u calculate neutron

Answer 8

mass number - proton

Question 9

isotopes

Answer 9

elements which have the same number of protons, but different numbers of neutrons

Question 10

ions

Answer 10

Losing or gaining of electrons

Question 11

how do u gain a positive charge and a negative charge?

Answer 11

losing an electron gains a positive and gaining an electron gains a negative charge

Question 12

atomic radius

Answer 12

the measurement of the size of each atom from its nucleus to outermost electrons.

Question 13

why does the atomic radius decrease as we go across a period?

Answer 13

because the number of protons and electrons increases

Question 14

why does an atomic radius increase as we go down a group?

Answer 14

This is caused by the addition of a new energy shell of electrons.

Question 15

electronegativity

Answer 15

the ability of an atom to attract electrons. The higher the number the more electronegative the atom.

Question 16

why does electronegativity increase as we go across a period?

Answer 16

it increases as we go across a period because of the increase in protons as it is pulling the electrons closer to the nucleus.

Question 17

nuclear charge

Answer 17

as u go across the periodic table, there is a more of a stronger pull of electrons towards the nucleus and less shielding occurs.

Question 18

ionic bond

Answer 18

the electrostatic attraction between positive and negative ions.

Question 19

cations

Answer 19

atoms which become negatively charged ions.

Question 20

anions

Answer 20

atoms become negatively charged ions.

Question 21

covalent bonding

Answer 21

Formed between 2 non metal atoms connected by a pair of valence atoms.

Question 22

why does electronegativity decrease as we go down a group?

Answer 22

because the outer electrons are far away from the nucleus and have less pull towards the nucleus.