What was the limitation of classification of elements in periodic table of Mendeleev ?
(A) He could not give fixed position to Hydrogen in periodic table
(B) It was a challenge for Mendeleev the arrangement of isotopes of element
(C) For some elements going from one element to other element, atomic mass was not increasing
in regular way
(D) All three
In periodic table of Mendeleev why noble gases elements were not given position at the time of
arrangement because.........
(A) These gases were discovered late as they are inert
(B) Their amount is very less in the atmosphere
(C) (A) and (B) both
(D) During that their atomic mass were not known
Which scientist stated that the atomic number (Z) of an element is a more fundamental property
than its atomic masses ?
(A) Henry Moseley (B) Newland (C) Dobereiner (D) All three given
Which of the following is the modern periodic law ?
(A) Properties of elements are a periodic function of their atomic number
(B) Properties of elements are a periodic function of their atomic mass
(C) Properties of elements are a periodic function of their chemical properties
(D) Properties of elements are a periodic function of their isotopes
How was the classification of elements done in modern periodic table ?
(A) 6 periods and 8 group (B) 6 periods and 18 group
(C) 7 periods and 8 group (D) 7 periods and 18 group
The maximum number of electrons that can be accommodated in a shell depends on the formula
.........
(A) n
2
(B) 2n
2
(C) 3n
2
(D) 4n
2
How many maximum electrons are present in K shell ?
(A) 2 (B) 8 (C) 18 (D) 32
How many maximum electrons can be accommodated in L shell ?
(A) 2 (B) 8 (C) 18 (D) 32
Maximum how many electrons can be accommodated in M shell ?
(A) 2 (B) 8 (C) 18 (D) 32
Maximum how many electrons can be accomodated in N shell ?
(A) 2 (B) 8 (C) 18 (D) 32
By what name number of valence electrons in outermost shell of any atom is known ?
(A) Valence (B) Outermost electron
(C) Period number (D) Position of atom in group
By what name the distance between the centre of the nucleus and outermost shell of an isolated
atom is known ?
(A) Valency (B) Atomic size (C) Molecular size (D) None of these
1 Picometre means = ..........
(A) 10–10 m (B) 10–9 m (C) 10–12 m (D) 1012 m
What happens in moving from left to right along a period ?
(A) increases (B) decreases
(C) no change is occured (D) decreases and increases
What change is seen in any group moving up to down ?
(A) increases (B) decreases
(C) no change occurs (D) decreases and then increases
Which of the following metals is known as semi metal or metalloid ?
(A) Boron (B) Silicon (C) Arsenic (D) all given
Answers
AnswerS
What was the limitation of classification of elements in periodic table of Mendeleev ?
- Answer is Option(D) All three
In periodic table of Mendeleev why noble gases elements were not given position at the time of arrangement because
- Answer is Option(C) , (A) and (B) both
Which scientist stated that the atomic number (Z) of an element is a more fundamental property than its atomic masses ?
- Answer is Option(A) Henry Moseley
Which of the following is the modern periodic law ?
- Answer is , (A) Properties of elements are a periodic function of their atomic number.
How was the classification of elements done in modern periodic table ?
- Answer is Option(D) 7 periods and 18 group
The maximum number of electrons that can be accommodated in a shell depends on the formula
- Answer is Option(B) 2n²
How many maximum electrons are present in K shell ?
- Answer is Option(A) 2
How many maximum electrons can be accommodated in L shell ?
- Answer is Option(B) 8
Maximum how many electrons can be accommodated in M shell ?
- Answer is Option(C) 18
Maximum how many electrons can be accommodated in N shell ?
- Answer is Option(D) 32
By what name number of valence electrons in outermost shell of any atom is known ?
- Answer is Option(A) Valence
By what name the distance between the center of the nucleus and outermost shell of an isolated atom is known ?
- Answer is Option(B) Atomic size
1 Picometre means =
- Answer is Option(C) 10⁻¹²m
Which of the following metals is known as semi metal or metalloid ?
- Answer is Option(D) all given