Need some help... Can you check my answers.... Correct me if i am wrong please.?

[vemados]

3. What does the periodic law state?
(Points : 3)

I think it is the second one!

When elements are arranged in order of increasing atomic mass, there is a recurring pattern to their physical and chemical properties.

When elements are arranged in order of increasing atomic size, there is a recurring pattern to their physical and chemical properties within a group.

When elements are alphabetized, there is a periodic pattern to their physical and chemical properties within a period.

When elements are arranged in order of increasing atomic number, there is a recurring pattern to their physical and chemical properties.


4. What is true of elements in a period on the periodic table?
(Points : 3)
They have similar properties.

They have similar names.

They have different properties that show no pattern.

They have different properties that repeat across the next period. <------------- I think this is the right one...


5. Which element has the same number of energy levels as aluminum (Al) and the same number of valence electrons as calcium (Ca)?
(Points : 3)
magnesium (Mg)<----------------- I think it is this one...

beryllium (Be)

sodium (Na)

potassium (K)


6. Which element has seven energy levels?
(Points : 3)
rubidium (Rb)

cesium (Cs)

potassium (K)

francium (Fr) <------ this one.. Not that sure though


7. Which of the following elements has the most properties in common with molybdenum (Mo)?
(Points : 3)
manganese (Mn)

iron (Fe)

vanadium (V)

chromium (Cr) <--------- this one?


8. Which element has the same number of valence electrons as hydrogen (H)?
(Points : 3)
helium (He)

oxygen (O)

nitrogen (N)

lithium (Li) <----------------- I think it is this one...


9. What happens to the atomic size of the elements as one goes from the top to the bottom of a group?
(Points : 3)
Atomic size stays the same as one moves from top to bottom in a group.

Atomic size decreases as one moves from top to bottom in a group. <------------------ This one sounds right.

Atomic size changes randomly as one moves from top to bottom in a group.

Atomic size increases as one moves from top to bottom in a group.

[galvin]

3. What does the periodic law state?
(Points : 3)

I think it is the second one!

When elements are arranged in order of increasing atomic mass, there is a recurring pattern to their physical and chemical properties.

When elements are arranged in order of increasing atomic size, there is a recurring pattern to their physical and chemical properties within a group.

When elements are alphabetized, there is a periodic pattern to their physical and chemical properties within a period.

When elements are arranged in order of increasing atomic number, there is a recurring pattern to their physical and chemical properties.


4. What is true of elements in a period on the periodic table?
(Points : 3)
They have similar properties.

They have similar names.

They have different properties that show no pattern.

They have different properties that repeat across the next period. <------------- I think this is the right one...


5. Which element has the same number of energy levels as aluminum (Al) and the same number of valence electrons as calcium (Ca)?
(Points : 3)
magnesium (Mg)<----------------- I think it is this one...

beryllium (Be)

sodium (Na)

potassium (K)


6. Which element has seven energy levels?
(Points : 3)
rubidium (Rb)

cesium (Cs)

potassium (K)

francium (Fr) <------ this one.. Not that sure though


7. Which of the following elements has the most properties in common with molybdenum (Mo)?
(Points : 3)
manganese (Mn)

iron (Fe)

vanadium (V)

chromium (Cr) <--------- this one?


8. Which element has the same number of valence electrons as hydrogen (H)?
(Points : 3)
helium (He)

oxygen (O)

nitrogen (N)

lithium (Li) <----------------- I think it is this one...


9. What happens to the atomic size of the elements as one goes from the top to the bottom of a group?
(Points : 3)
Atomic size stays the same as one moves from top to bottom in a group.

Atomic size decreases as one moves from top to bottom in a group. <------------------ This one sounds right.

Atomic size changes randomly as one moves from top to bottom in a group.

Atomic size increases as one moves from top to bottom in a group.

The first one is this:

When elements are arranged in order of increasing atomic number, there is a recurring pattern to their physical and chemical properties.

[sonny]

3) 4th one
4) vertically in their period,or similar properties that repeat across the nex tperiod.
5) Mg
6) Fr
7) Cr
8) Li
9) size decreases.