science 9 quiz

Question 1

Name an example of a metal and a non metal element

Answer 1

check answer

Question 2

List 2 properties of a non metal and metal (ex: malleabillity, ductility, luster, conductivity of electricity, state at room temperature,ect..

Answer 2

metals, copper: high malleabillity, gold good conductor of electricity.
non metals, sulfur is room temp, phosphorus has many different forms.

Question 3

what does the periodic table show for each element?

Answer 3

element symbol, element name, atomic number, atomic mass, electron configuration, state of matter, group and period.

Question 4

differentiate atomic number from mass number using a specific elemnt for example

Answer 4

the atomic number shows the element and counts the proton, mass number counts both protons and neutrons.

Question 5

describe the pattern of each on the periodic table

Answer 5

the atomic number increases in specific order from left to right.

Question 6

what are the horizontal rows on the periodic table called

Answer 6

periods because it represents different energy levels of electrons.

Question 7

what are the vertical columns on the periodic table called

Answer 7

groups or families

Question 8

how many families/groups are on the periodic table

Answer 8

18

Question 9

describe alkali metals 3 examples

Answer 9

highly reactive, low meliting and boiling points, easily looses one electron to form positive ions.

Question 10

describe alkaline earth metals 3 examples

Answer 10

this metal is harder and denser than alkali metals, used in aerospace applications, forms compounds that are ionic in nature.

Question 11

describe halogens 3 examples

Answer 11

highly reactive, forms diatomic molecules, soft elements

Question 12

state how many protons are in silicon

Answer 12

14

Question 13

state how many protons are in chromium

Answer 13

24

Question 14

state how many protons are in iodine

Answer 14

53

Question 15

how does the bohr model of an atom show the arrangement of electrons

Answer 15

it shows electrons arranged in fixed orbits around the nucleus at specific energy levels

Question 16

what are electron shells/orbits

Answer 16

the defined energy levels around and atoms nucleus where electrons are likely found.

Question 17

how many electrons can the nearest nucleus hold

Answer 17

2 electrons

Question 18

how many can the 2nd and 3rd shell hold

Answer 18

second shell: 8, 3rd shell: 18 electrons.

Question 19

list the patterns on the periodic table for valence (outer shell) electrons

Answer 19

group 1, 1 electron, group 2, 2 electrons, group 13, 3 electrons, group 14, 4 electrons, group 15, 5 electrons and so on….

Question 20

write the symbol for silver

Answer 20

Ag

Question 21

write the atomic number of copper

Answer 21

29

Question 22

write the number of protons of tungsten

Answer 22

74

Question 23

write the number of electrons of phosphorus

Answer 23

15

Question 24

write the number of neutrons for boron

Answer 24

6

Question 25

why are noble gases stable

Answer 25

they have a complete outer electron shell

Question 26

how can metals achieve a kind of stability like noble gases

Answer 26

by loosing their outer electrons to form positive ions

Question 27

how can non metals achieve a kind of stability like noble gases

Answer 27

by gaining or sharing electrons to fill their outer shell.

Question 28

differentiate atoms and ions

Answer 28

atoms are neutral particals and ions are charged particals

Question 29

what is a cation

Answer 29

positively charged ion

Question 30

what is an antion

Answer 30

negatively charged ion