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1 : Identify the electronic configuration of the outermost shell of a transition metal.

1 : Ns2np4

2 : Ndxns2

3 : Ns2np6

4 : Ns2+np5

2 : In which period and group will you place the element which is an important part of the solar cell?

1 : Third period and 14th group

2 : 2nd period and 14th group

3 : Third period and 15th group

4 : 3rd period and 16th group

3 : Which is the shortest metal?

1 : Na

2 : Ca

3 : AI

4 : Zn

4 : How many electrons can nitrogen accept in its outersmost shell?

1 : 2

2 : 3

3 : 4

4 : 5

5 : Which element is the most reactive element?

1 : Oxygen

2 : Chlorine

3 : Fluorine

4 : Nitrogen

6 : A yellow solid element exist in allotropic forms which is also present in fossil fuels: indicate the name.

1 : Carbon

2 : Iodine

3 : Aluminium

4 : Sulphur

7 : In what order does the metallic character change in the second group?

1 : Mg>Ca>Ba>Sr

2 : Sr> Ba> Ca> Mg

3 : Mg>Sr>Ca >Ba

4 : Ba >Sr >Ca> Mg

8 : Which of the following best described the character order of oxygen, fluorine, and nitrogen's atomic radii?

1 : O< F

2 : N

3 : F

4 : O

9 : The element having less value of ionization energy and less value of electron affinity in likely to belong to:

1 : Group 1

2 : Group 13

3 : Group 16

4 : Group 17

10 : Which element has the highest melting point?

1 : Na

2 : K

3 : Rb

4 : Cs

11 : How many groups are there in the modern periodic table?

1 : 8

2 : 18

3 : 7

4 : 10

12 : Who is credited with developing the modern periodic table?

1 : Dmitri Mendeleev

2 : Henry Moseley

3 : John Dalton

4 : J.J. Thomson

13 : Which element is located in Group 1 and Period 3?

1 : Lithium (Li)

2 : Sodium (Na)

3 : Potassium (K)

4 : Magnesium (Mg)

14 : The modern periodic table is arranged in increasing order of:

1 : Atomic mass

2 : Atomic number

3 : Neutron number

4 : Electronegativity

15 : The period number indicates the number of:

1 : Valence electrons

2 : Electron shells

3 : Bromine (Br)

4 : Iodine (I)

16 : Which group contains elements that form ions with a charge of -1?

1 : Group 1

2 : Group 17

3 : Group 2

4 : Group 18

17 : The charge on ions formed by oxygen is:

1 : -1

2 : -2

3 : +1

4 : +2

18 : Which element is located in Group 17 and Period 2?

1 : Fluorine (F)

2 : Similar physical properties

3 : The same number of protons

4 : The same atomic size

19 : Elements in the same group have similar:

1 : Atomic numbers

2 : Atomic masses

3 : Valence electrons

4 : Number of neutrons

20 : Atomic size decreases across a period because:

1 : New shells are added

2 : Electrons are removed

3 : Nuclear charge increases

4 : Valence electrons decrease

21 : Atomic size increases as you move:

1 : Across a period from left to right

2 : Down a group

3 : Up a group

4 : Across a period from right to left

22 : Elements in the same group have:

1 : Similar physical properties

2 : Similar chemical properties

3 : The same number of protons

4 : The same atomic size

23 : Elements with the same number of valence electrons are placed in the same:

1 : Group

2 : Period

3 : Row

4 : Block

24 : Ionization energy increases across a period because:

1 : Atomic size decreases

2 : Atomic number decreases

3 : Valence electrons increase

4 : Electron shielding increases

25 : Which of the following elements has the lowest electronegativity?

1 : Fluorine (F)

2 : Potassium (K)

3 : Oxygen (O)

4 : Sodium (Na)

26 : Ionization energy decreases as you move:

1 : Across a period from left to right

2 : Down a group

3 : Up a group

4 : Across a period from right to left

27 : Atomic size is smallest in:

1 : Noble gases

2 : Alkali metals

3 : Halogens

4 : Alkaline earth metals

28 : The group number of an element with 5 valence electrons is:

1 : 5

2 : 10

3 : 15

4 : 16

29 : How many periods are there in the modern periodic table?

1 : 5

2 : 6

3 : 7

4 : 8

30 : The smallest atomic size in Period 2 is found in:

1 : Lithium (Li)

2 : Carbon (C)

3 : Fluorine (F)

4 : Neon (Ne)

31 : As the number of electron shells increases, the atomic size:

1 : Increases

2 : Decreases

3 : Stays the same

4 : Becomes unpredictable

32 : Which element has the largest atomic size?

1 : Fluorine (F)

2 : Sodium (Na)

3 : Potassium (K)

4 : Cesium (Cs)

33 : Elements with low ionization energy are usually:

1 : Non-metals

2 : Metals

3 : Noble gases

4 : Metalloids

34 : Metallic character increases as you move:

1 : Across a period from left to right

2 : Down a group

3 : Up a group

4 : Across a period from right to left

35 : Electron affinity refers to the energy change when:

1 : An atom gains an electron

2 : An atom loses an electron

3 : An atom forms a bond

4 : An atom breaks a bond

36 : Ionization energy is the energy required to:

1 : Add an electron to an atom

2 : Remove an electron from an atom

3 : Split an atom into two parts

4 : Form a chemical bond

37 : Which element is the most metallic?

1 : Sodium (Na)

2 : Potassium (K)

3 : Cesium (Cs)

4 : Magnesium (Mg)

38 : Which of the following elements has the highest ionization energy?

1 : Sodium (Na)

2 : Fluorine (F)

3 : Oxygen (O)

4 : Neon (Ne)

39 : Non-metals typically have:

1 : High electronegativity

2 : Low electronegativity

3 : High metallic character

4 : Low ionization energy

40 : The element with the highest electronegativity is:

1 : Oxygen (O)

2 : Fluorine (F)

3 : Chlorine (Cl)

4 : Neon (Ne)

41 : Electronegativity decreases:

1 : Across a period from left to right

2 : Across a period from right to left

3 : Down a group

4 : As atomic size decreases

42 : The horizontal rows in the periodic table are called:

1 : Groups

2 : Families

3 : Periods

4 : Columns

43 : The charge on ions formed by Group 2 elements is:

1 : +1

2 : -1

3 : +2

4 : -2

44 : Group 1 elements form ions with a charge of:

1 : +1

2 : -1

3 : +2

4 : 0

Chemistry 9th MCQs || Ilam Ghar