Chemistry AS Module 3.1 Foundations

What is the similarity in the electron configurations for atoms and ions of the group 17 elements F-I?

• seven electrons in its outer shell: ns2 np5, and forms a 1+ ion

• seven electrons in its outer shell: ns1 np6, and forms a 1– ion

• seven electrons in its outer shell: ns2 np5, and forms a 1– ion

• seven electrons in its outer shell: ns2 np5, and forms a 2– ion

What block in the periodic table contains Re (75)

• s

• p

• d

• f

Write the shorthand electron configuration using the nearest noble gas for Chlorine.

• [Ar] 3s2 3p5

• [Ne] 3s2 3p5

• [Ne] 3s1 3p6

• [Ne] 3s2 3p4

Write the electron configuration in terms of sub shells for Cobalt

Click on the correct statements.

• The smaller the atomic radius, the smaller the nuclear attraction experienced by outer electrons.

• The higher the nuclear charge, the larger the attractive force on the outer electrons.

• Inner shells of electrons attract the outer shell electrons because they are all negative, this is called shielding.

• The more inner shells they are, the larger is the shielding effect and the smaller is the nuclear attraction experienced by the outer electrons.

What equations represent the 1st and 4th ionisation energy of chlorine?

• Cl(g) → Cl⁺(g) + e^– Cl³⁺(g) → Cl⁴⁺(g) + e^–

• Cl₂(g) → 2Cl⁺(g) + 2e^– Cl₂³⁺(g) → Cl₂⁴⁺(g) + 2e^–

• Cl(g) → Cl⁺(g) + e^– Cl²⁺(g) → Cl^3+(g) + e^–

• Cl(g) → Cl⁺(g) + e^– Cl⁴⁺(g) → Cl⁵⁺(g) + e^–

Ionisation energy values across each period show a general?

• increase

• decrease

Select the facts that are true as you move down a group

• Number of shells increase

• Shielding decrease

• atomic radius increases

• first ionisation energy decreases

Select the properties for metallic lattices

• High melting and boiling points

• Soluble in polar solvents

• Good electrical conductivity

• Malleable and ductile

Moving across a period from sodium to aluminium, select the statements that are true.

• Ionic charge increases

• Ionic size increases

• number of outer electrons increases

• attraction increases: melting and boiling point increases