Periodic Table Isotopes and Atomic Structure

Atomic Structure and the Periodic Table

What do you remember from the last class?

Can you connect the last lesson to the periodic table?

Multiple Choice

What is the centre of the atom called?

• protons

• neutrons

• nucleus

• electrons

Multiple Choice

What is the charge of one electron?

• One positive

• no charge

• one negative

Multiple Choice

What is the atomic number of an atom equal to?

• The numbers of protons and neutrons in the nucleus

• The number of neutrons in the nucleus

• The number of protons in the nucleus

Multiple Choice

What is the atomic mass of an atom equal to?

• The numbers of protons and neutrons in the nucleus

• The number of neutrons in the nucleus

• The number of protons in the nucleus

Multiple Choice

What is the relative mass and charge of a neutron?

• Mass = 1 and charge = -1

• Mass = 0 and charge = +1

• Mass = 1 and charge = 0

Multiple Choice

What is the plum pudding model of the atom?

• An atom is a ball of positive charge with negative electrons embedded in it

• An atom is a ball of negative charge with positive electrons embedded in it

• An atom is a ball of positive charge with negative neutrons embedded in it

Multiple Choice

Which scientist found evidence for the existence of neutrons?

• Ernest Rutherford

• James Chadwick

• Niels Bohr

Multiple Choice

What is the radius of a typical atom?

• 1 × 10^-10 m

• 1 × 10^-6 m

• 1 × 10^-14 m

Elements are organised by their atomic number (number of protons)

Reading the Periodic Table

Elements are organised by their atomic number. (number of protons)

Mass is rounded to a whole number when written out. (protons + neutrons = mass)

Multiple Choice

What is this element's symbol?

• 19

• K

• Potassium

• 39.0983

Multiple Choice

What is this element's name?

• 19

• K

• Potassium

• 39.0983

Multiple Choice

What is this element's number of protons?

• 19

• K

• Potassium

• 39.0983

Multiple Choice

What is this element's mass?

• 19

• K

• Potassium

• 39.0983

Multiple Choice

How many neutrons are in this atom?

• 14

• 6

• 8

write this into your book and fill in the blanks.

protons = atomic number

protons + neutrons = mass

Isotope = same number of protons but neutrons and overall mass are different.

Multiple Choice

Four atoms have the numbers of protons and neutrons given below. Which two atoms are isotopes of the same element?

W: 8 protons and 8 neutrons

X: 8 protons and 10 neutrons

Y: 10 protons and 8 neutrons

Z: 9 protons and 10 neutrons

• X and Y

• W and X

• X and Z

Periods and Groups

The columns are called groups. The groups have similar properties and have the same number of electrons in the outer shell.

The rows are called periods. Each period has the same number of electron shells.