From top to bottom, does atomic size increase or decrease and why?
It increases because as you go down a group, you are adding more energy levels
100
What is ionization energy?
The amount of energy required to remove a valence electron from an atom.
100
What is electronegativity?
The tendency of an atom to gain an electron
100
What is the difference between the ion size in positive ions versus a neutral atom?
The size of a positive ion is smaller that its neutral atom
200
From left to right, does atomic size increase or decrease and why?
It decreases because all electrons in a period are in the same energy level. The more protons in a nucleus, the greater the pull on the electrons so the atom is smaller.
200
From top to bottom, does ionization energy increase or decrease and why?
It decreases because as you go down a group you add energy levels so the electron is farther from the nucleus and therefore easier to pull away.
200
From top to bottom, does electronegativity increase or decrease and why?
It decreases because shielding with more energy levels blocks the pull from the nucleus.
200
What is the difference between the ion size in negative ions versus a neutral atom?
The size of a negative ion is bigger compared to its neutral atom.
300
Rank the following elements in order of increasing atomic size.
carbon, silicon, fluorine
Fluorine < carbon < silicon
300
From left to right, does ionization energy increase and decrease and why?
It increases as you add more protons and electrons to the same energy level the pull becomes greater making it harder to remove a valence electron.
300
Why aren't noble gases considered when talking about the trend in electronegativity?
Because they have a full valence shell, they are stable, and they are electrically neutral.
300
Which of the following ions has largest size?
K, Ca, Cs, Ba, Be
Cs
400
Which of the following has the largest atomic size?
carbon, silicon, germanium, tin
Tin
400
What is shielding?
As you add more energy levels to the atom, the pull from the nucleus decreases because the electrons between block the positive pull.
400
Which of these elements has the highest electronegativity?
Lithium, Nitrogen, Potassium, Arsenic, Beryllium
Nitrogen
400
Which of the following ions has the largest ionic size?
Na, Li, K, Rb
Rb
500
Which of the following has the largest atomic size?
Nitrogen, oxygen, fluorine, neon
Nitrogen
500
What is the 1st and 2nd ionization energy?
1st Ionization Energy: Energy required to remove an atoms first valence electron
2nd Ionization Energy: Energy required to remove 2nd valence electron
500
Which of these elements has the lowest electronegativity?
Lithium, Nitrogen, Potassium, Arsenic, Beryllium, Sodium
Sodium
500
Why is K+ smaller than K?
Because K lost electrons so the ratio of electrons to protons is smaller.