Layout of Modern Periodic Table

Q.

What period are Lanthanides?

Q.

Why do isotopes occupy the same position in the periodic table?

Q.

Which period is occupied by the rare earth elements?

1. Period 6

2. Period 7

3. Period 1

4. Period 2

Q. According to modern periodic law, the properties of elements are a periodic function of their

1. atomic masses
2. atomic volumes
3. atomic numbers
4. densities

Q.

What are groups and periods in a periodic table?

Q.

Isotopes of chlorine (chlorine-35 and chlorine-37) have different atomic masses but are kept in different slots of the periodic table.

1. True

2. False

Q.

Which scientist used X-ray diffraction experiments to classify the elements?

1. J.W Dobereiner

2. John Dalton

3. Henry Moseley

4. Dmitri Ivanovich Mendeleev

Q.

Consider the isotopes of carbon, i.e., C-12, C-13, C-14 would you place them in the same or different slots in the periodic table? Give reason.

Q.

Which metal is commonly used in thermometers due to its property of expanding according to change in temperature?

1. Cadmium

2. Calcium

3. Magnesium

4. Mercury

Q. What are lanthanides?

Q.

Generally isotopes of an element have similar ___________________ properties but different _______________ properties. The options in the blanks respectively are:

1. chemical, physical

2. physical, chemical

3. special, chemical

4. radioactive, chemical

Q. Which period is occupied by the rare earth elements?

1. Period 6
2. Period 7
3. Period 2
4. Period 1

Q.

What are the horizontal rows and vertical columns in a periodic table known as?

Q.

What are transitional elements?

Q. Assertion :All the three isotopes of hydrogen have almost the same chemical properties. Reason: Isotopes differ from one another in respect of the presence of neutrons.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Group 18 is also called Zero group.True or False?

1. True
2. False

Q. According to modern periodic table the elements from group 3 to group 12 are known as:

1. transition elements
2. halogens
3. alkali metals
4. alkaline earth metals

Q. Which of the following property progressively increases down a group in the modern periodic table?

1. Electronegativity

2. Ionization potential

3. Size of the atom

4. Electron affinity

Q.

Identify the elements in the Periodic Table that are liquid at room temperature.

1. Bromine (Br)
2. Mercury (Hg)
3. Helium (He)
4. Carbon (C)

Q. The valency of noble gases, in general is

1. Zero
2. Two
3. One
4. Eight

Q. Most nonmetallic elements are present on the left side of the periodic table.

1. True
2. False

Q. How will the tendency to gain electrons change as we go from left to right across a period?
[1 Mark]