Periodic Table and atoms

Question 1

Elements in the Periodic Table are arranged in order of increasing……

Answer 1

Atomic number

(number of protons)

Question 2

Groups are columns in the Periodic Table containing elements with the same number of……

Answer 2

Number of outer electrons

(equal to the group number)

Question 3

Elements within a group share the same valency and have similar chemical properties because……

Answer 3

…they have the same number of electrons in their outer energy levels.

Question 4

State the subatomic particles in an atom and their location in the atom

Answer 4

protons and neutrons in the nucleus.

Electrons in the energy levels (outside the nucleus)

Question 5

State the relative mass and charge of electrons, protons and neutrons

Answer 5

electrons - mass = 0, charge = -1
protons - mass = 1, charge = +1
neutron - mass = 1, charge = 0

Question 6

Atomic number = number of ______

Answer 6

Atomic number = number of protons

Question 7

In a neutral atom the number of electrons = number of what subatomic particle?

Answer 7

Number of electrons

Number of protons

Question 8

The element with electron arrangement 2,8,1 is in group…

Answer 8

1

outer electrons give group number

Question 9

Mass number of an atom =

Answer 9

Mass number =

number of protons + number of neutrons

Question 10

An isotope is….

Answer 10

atoms with the same atomic number but different mass numbers,
or
atoms with the
same number of protons but different numbers of neutrons.

Question 11

relative atomic masses

Answer 11

Most elements have two or more isotopes.
Relative atomic mass is….
the average atomic mass that has been calculated for each element using the mass and proportion of each isotope present.

Question 12

Nuclide notation

Answer 12

The symbol of an element with mass number (top left-superscript) and atomic number (bottom right-subscript)