Which property do transition metals have in common?(1 point)
Responses
They usually have high melting points.
They usually have high melting points.
They are usually very reactive.
They are usually very reactive.
They usually have low densities.
They usually have low densities.
They are usually very soft.
Answers
1. A - They usually have high melting points
2. D - low or no reactivity
3. A - Li and Fr
4. D - 17 - halogens
5. C - They have a different number of electrons in their outer shells.
They usually have high melting points.
Neon and argon are both in Group 18 of the periodic table. Which property do they most likely share?(1 point)
Responses
metallic texture
metallic texture
strong odor
strong odor
silver color
silver color
low or no reactivity
low or no reactivity
A scientist studies an element that has seven electrons in its outer shell, is fairly toxic, is a gas at room temperature, and is highly reactive. To which group of the periodic table does this element belong?(1 point)
Responses
2 - alkaline earth metals
2 - alkaline earth metals
1 - alkali metals
1 - alkali metals
18 - noble gases
18 - noble gases
17 - halogens
17 - halogens
On the periodic table, lithium and beryllium are in different groups. Which statement describes why the two elements are in different groups?(1 point)
Responses
They have a different number of electron shells.
They have a different number of electron shells.
They are different colors.
They are different colors.
They have a different number of electrons in their outer shells.
They have a different number of electrons in their outer shells.
They have different atomic numbers.
Correct answers:
1. A - They usually have high melting points
2. D - low or no reactivity
3. A - Li and Fr
4. D - 17 - halogens
5. A - They have a different number of electron shells
Which two elements most likely have similar properties?
(1 point)
Responses
Li and Fr
Li and Fr
Cs and Rn
Cs and Rn
F and Ne
F and Ne
Ca and Sc