Free Printable Higher Chemistry - Unit 1

Worksheets

Higher Chemistry - Unit 1 - Periodicity

Total questions: 15

Worksheet time: 17mins

Name

Class

Date

What makes a valence electron more attracted to the nucleus?

less distance between the nucleus and having less protons

less distance between the nucleus and having more protons

more distance between the nucleus and having less protons

more distance between the nucleus and having more protons

What is the tendency of an atom to attract electrons towards itself?

atomic radius

ionization energy

shielding

Electronegativity

The higher the ionization energy...

the more attracted the valence electron is to the nucleus

the less attracted the valence electron is to the nucleus

the more attracted the valence electron is to another electron

the less attracted the valence electron is to another electron

Which is larger... P or P^3- ?

P^3- because it gains an energy level

P^3- due to extra electron repulsion

P because it loses an energy level

P because of extra electron repulsion

Why does ionization energy decrease going down a group?

Adding more energy levels makes the ve- further from the nucleus

There are more valence electrons in the outer shell

There are more protons in the nucleus

There are less protons in the nucleus

Why does electronegativity increase across a period?

Adding more energy levels makes the ve- further from the nucleus

There are more valence electrons in the outer shell

There are more protons in the nucleus

There are less protons in the nucleus

Which is smaller... Mg or Mg²⁺ ?

Mg because it gains an energy level

Mg due to extra electron repulsion

Mg²⁺ because of extra electron repulsion

Mg²⁺ because it loses an energy level

List the following from largest to smallest atomic radius.
P, Cs, Co, Sr

P, Co, Sr, Cs

P, Cs, Co, Sr

Cs, Sr, Co, P

Sr, Cs, Co, P

What happens to atomic radius across a period?

the atoms get bigger because the nucleus is bigger as more protons are added

the atoms get bigger because there are more ve-

the atoms get smaller because with more attraction to the extra protons, the e- cloud moves closer to the nucleus

10.

Which statement is correct

Electronegativity decreases as you go acorss the period as the electrons are further away from nucleus

Atomic radius decreases as you go across period as the nuclear charge is stronger which pulls the electrons in closer

Ionisation energy increases as you go down group as there is a stronger pull on outer electrons

Atomic size increases as you go across the period as the atom gets bigger

11.

What can you infer about elements that are in the

same group?

They will have the similar chemical properties.

They will contain the same number of protons.

They will display similar atomic masses.

They will emit X rays of similar frequency.

12.

Order the following in decreasing electronegativity value:

Ga, Fe, As, K

K, As, Fe, Ga

As, Ga, Fe, K

Fe, K, Ga, As

13.

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

increases, decreases

increases, increases

14.

The minimum energy required to remove an electron from the ground state of an atom

electron configuration

energy levels

ionization energy

ionic bond

15.

Factors affecting the ionisation energy:

Atomic radius

Effective nuclear charge

Shielding effect

All of the above

100 %

Higher Chemistry - Unit 1 - Periodicity

Total questions: 15

Worksheet time: 17mins

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