Notes: Periodic Trends

Open Ended

Why do atoms "want" to achieve a full set of valence electrons, and how does this relate to their stability and reactivity?

Multiple Choice

How do the number of valence electrons influence whether an atom is more likely to lose or gain electrons during a chemical reaction?

• Atoms with fewer valence electrons are more likely to gain electrons, while atoms with more valence electrons are more likely to lose electrons.

• Atoms with fewer valence electrons are more likely to lose electrons, while atoms with more valence electrons are more likely to gain electrons.

• All atoms are equally likely to lose or gain electrons regardless of their valence electrons.

• Atoms with a full set of valence electrons are the most reactive.

Multiple Choice

How many valence electrons are shown in the diagram?

• 16

• 7

• 6

• 2

Multiple Choice

Which of the following will have a lower ionization energy than Scandium (Sc)?

• Helium (He)
• Titanium (Ti)
• Calcium (Ca)
• Magnesium (Mg)

Multiple Choice

Which of the following statements is true regarding successive ionisation energies?

• They decrease with each successive electron removed

• They increase with each successive electron removed

• They remain constant

• They fluctuate randomly

Multiple Choice

As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more nuetrons

Multiple Choice

As you move across the periodic table atoms tend to get smaller because, ______________.

• the atoms have more mass.
• the atoms have less mass
• the atoms have more protons.
• the atoms have less electrons.

Multiple Choice

What is electron affinity?

• How stable energy is released when gaining electrons

• How stable particles are when further away from nucleus

• How stable nucleus is when closer to particles

• How stable energy is kept when losing electrons

Multiple Choice

What is the unit of measurement for electron affinity?

• g/mole

• kJ/mole

• mole/kJ

• m/g

Multiple Choice

A nonmetal has a higher electron affinity.

• True

• False

Multiple Choice

Rank the following by increasing reactivity:

K, Mg, Na

• Mg, Na, K

• K, Mg, Na

• K, Na, Mg

• Na, Mg, K

Multiple Choice

Rank the following by increasing reactivity:

Ar, As, Cl, P

• As, P, Cl, Ar

• Ar, Cl, P, As

• Cl, P, As, Ar

• Ar, As, P, Cl

Multiple Choice

Rank the following by decreasing reactivity:

Hf, Rf, Ti, Zr

• Ti, Zr, Hf, Rf

• Rf, Hf, Zr, Ti

• Hf, Rf, Ti, Zr

• Zr, Ti, Rf, Hf