Which element is found in the group described by the statement below? This group contains poisonous, very reactive elements often used in bacteria killing or household cleaners.
Helium (He)
Sodium (Na)
Iodine (I)
Hydrogen (H)
Elements in Group 2 are known as the _____.
metalloids
halogens
alkaline earth metals
alkali metals
Which of the following is the poorest conductor of electricity? Which of the following is the poorest conductor of electricity?
Silicon (Si)
Fluorine (F)
Cobalt (Co)
Calcium (Ca)
Which two elements would have the most similar atomic radii?
Aluminum and carbon
Boron and silicon
Beryllium and magnesium
Sodium and beryllium
Why are metals good conductors of electricity?
Their outer electrons are held very loosely.
Their protons are held very loosely.
Their protons are held very tightly.
Their neutrons are held very tightly.
As you move from top to bottom on the periodic table, what generally happens to the metallic character of elements?
It remains constant.
It increases, then decreases.
It decreases.
It increases.
Which of the following elements is a main group element?
Manganese
Gold
Aluminum
Copper
Which group does NOT contain transition metals?
Group 13
Group 9
Group 11
Group 5
Which element will predictably carry a positive 1 charge when it becomes an ion?
Calcium
Bromine
Gallium
Potassium
Which element has the highest electronegativity?
Fluorine
Barium
Carbon
Calcium
As you move from left to right on the periodic table, what happens to the electronegativity?
It decreases.
It increases.
It decreases, then increases with the noble gases
It remains constant.
Which of the elements below has the smallest ionization energy?
aluminum (Al)
bromine (Br)
sodium (Na)
francium (Fr)
As you move from top to bottom on the periodic table, what generally happens to the ionization energy?
it decreases
it cannot be determined
it increases
it remains constant
As you move from left to right on the periodic table, what generally happens to the ionization energy?
it decreases
it remains constant
it cannot be determined
it increases
Which of these elements has the largest atomic radius?
Silicon (Si)
Bromine (Br)
Astatine (At)
Barium (Ba)
As you move from top to bottom on the periodic table, what happens to the atomic radius?
It decreases, then increases.
It increases.
It increases, then decreases.
It decreases.
