atoms element and compound

Question 1

element

Answer 1

made up of only one type of atom

Question 2

atom

Answer 2

the smallest particle of a chemical element

Question 3

molecule

Answer 3

a group of atom bonded together

Question 4

compound

Answer 4

pure substance that are formed when 2 or more element chemically combine together

Question 5

mixture

Answer 5

contains more than one substance which could be element or compound

Question 6

metal

Answer 6

a solid material which is shiny hard or any physical characteristic

Question 7

non metal

Answer 7

a substance that is not metal

Question 8

proton number

Answer 8

number of proton in the nucleus of an atom

Question 9

mass number

Answer 9

total number of proton and neutron number in a nuclues of a atom

Question 10

ion

Answer 10

an electrically charged particle

Question 11

isotope

Answer 11

atoms of the same element which have same proton number but different neutron number

Question 12

relative atomic mass

Answer 12

average mass of an element compared to 1/12th of the mass of an atom of 12C

Question 13

neutron

Answer 13

an uncharged atomic particle which have mass almost nearly to that of proton

Question 14

electron

Answer 14

a negatively charged subatomic partice

Question 15

atomic nucleus

Answer 15

consist of positively charged proton and neutraly neutron

Question 16

why do elements react together

Answer 16

Atoms are more stable with a full outer shell, 8 electrons,

Question 17

chemical bonding in metal

Answer 17

metalic

Question 18

chemical bonding of metals and non metals

Answer 18

ionic

Question 19

chemical bonding in non metals

Answer 19

covalent

Question 20

metalic

Answer 20

electrostatic force of attraction between positive nuclei and negative delocalised electrons

Question 21

ionic

Answer 21

electron transfered from metal to non-metal atom

Question 22

covalent

Answer 22

electrons shared between non metal atom

Question 23

what bonding is in lattice

Answer 23

mettalic bonding

Question 24

lattice

Answer 24

a regular, repeating 3D structure within a crystal where atoms, ions, or molecules are arranged in an ordered, repeating pattern

Question 25

reactivity trend going down group 1

Answer 25

increases because it easier to remove an electron

Question 26

rectivity in group 7

Answer 26

decreases because it harder to remove electron

Question 27

What is the difference between the atomic number and the mass number for an element?

Answer 27

atomic number count only proton, while mass number count both proton and neutron

Question 28

Explain the conductivity of ionic compounds

Answer 28

they do conduct electricity when melted or dissolved in water.

Question 29

Explain the melting and boiling points of ionic compounds

Answer 29

high melting and boiling point because of the strong electrostatic force of attraction between opposistely charged ion

Question 30

boiling and melting point of metalic bonding

Answer 30

very high because large number of mettalic bonds

Question 31

boiling and melting point of ionic bonding

Answer 31

high because large number of very strong ionic bonds

Question 32

boiling and melting point of covalent

Answer 32

low because intermolecular force is weak between molecules

Question 33

Why do isotopes of the same element have the same chemical properties

Answer 33

because they have the same number of protons and electrons