Year 9 Periodic table Theory and Group I (2025-2026)

Last updated about 2 hours ago

9 questions

Year 9 Periodic table Theory and Group I (2025-2026)

Last updated about 2 hours ago

9 questions

1.13 Describe how Dmitri Mendeleev arranged the elements, known at that time, in a _____________  table by using the  _______________  of these elements and their compounds. 
Describe how Dmitri Mendeleev used his table to predict the existence and _______________ of some elements not then discovered.
Explain that Dmitri Mendeleev thought he had arranged elements in order of increasing relative ________________ but this was not always true because of the relative abundance of _____________ elements in the periodic table.

Other Answer Choices:

properties

periodic

atomic mass

isotopes

Describe that in the periodic table: 
a. Elements are arranged in order of increasing atomic number, in rows called ___________s.
b. Elements with similar properties are placed in the same vertical columns called
__________s.
Explain the meaning of atomic number of an element in terms of position in the periodic table and number of protons in the nucleus.
Number of electrons in outer shell = __________number 
Number of shells with elections = ___________number 
So sodium with a configuration of 2,8,1
is in period______(There are 3 numbers) 
Is in group ______ (the last number is a 1)

Other Answer Choices:

period

group

Identify elements as metals or non-metals according to their position in the periodic table, explaining this division in terms of the atomic structures of the elements.
Metals occur on the _________hand side.
Non-metals occur on the __________hand side.  

Other Answer Choices:

right

left

Predict the electronic configurations of the first 20 elements in the periodic table as diagrams and in the shorthand form, for example 2.8.1 for sodium.
He = ______ 
O = ________ 
Cl = ____________ 

Other Answer Choices:

2,8,8,7

2,6

Explain how the electronic configuration of an element is related to its position in the periodic table.

e.g. 2.3 

group = _______ (outer shell)
period = _______ (number of shells)

e.g. 2.8.8.2
Group = _______ 
Period = _______ 

Other Answer Choices:

hydroxide

low

sodium

halogens

soft

noble

alkali

6.4 Describe the pattern in reactivity of the alkali metals, lithium, sodium and potassium, with water; and use this pattern to predict the reactivity of other alkali metals.
From lithium to potassium the reactivity ______________ 
Therefore ____________  will be _________ reactive than potassium.
The reaction with water would be more ______________.

Other Answer Choices:

caesium

increases

vigourous

6.5 Explain this pattern in reactivity in terms of electronic configurations
As group 1 is descended there are more ___________ of electrons.
The outermost electron is ____________ from the nucleus.
The outermost electron is attracted _________  strongly to the nucleus.
The outermost electron can be lost_________ easily
The reactivity ______________ down the group

Other Answer Choices:

less

further

increases

shells

6.4 Describe the pattern in reactivity of the alkali metals, lithium, sodium and potassium, with water; and use this pattern to predict the reactivity of other alkali metals.

From lithium to potassium the reactivity _______ 

Caesium will be _______ reactive than potassium.

6.5 Explain this pattern in reactivity in terms of electronic configurations

As group 1 is descended there are more _______ of electrons.
The outermost electron is _______ from the nucleus.
The outermost electron is attracted _______  strongly to the nucleus.
The outermost electron can be lost_______ easily
The reactivity _______ down the group

Word bank (words can be reused)

further
increases
less
more
shells
sodium