What is the correct order of non-metallic character for the elements B, C, N, F, and Si?
1.
B > C > Si > N > F
2.
Si > C > B > N > F
3.
F > N > C > B > Si
4.
F > N > C > Si > B
The correct order of their chemical reactivity of the elements F, Cl, O and N in terms of oxidizing property is :
| 1. | F > Cl > O > N
|
2. | F > O > Cl > N
|
| 3. | Cl > F > O > N
|
4. | O > F > N > Cl |
The correct order of metallic character of elements B, Al, Mg and K is :
| 1. | B > Al > Mg > K
|
2. | Al > Mg > B > K
|
| 3. | Mg > Al > K > B
|
4. | K > Mg > Al > B |
Incorrect statement among the following is-
1) Elements are classified into periods and groups
2) Elements with similar properties are placed in the same group
3) This makes the study of elements simpler
4) Elements are placed according to decreasing atomic number
The maximum number of elements that can be accommodated in the sixth period are :
1. 8
2. 18
3. 32
4 16
The element named after Lawrence Berkeley Laboratory is:
1. Seaborgium
2. Lawrencium
3. Moscovium
4. Hafnium
Boron has lesser ionization enthalpy than Beryllium, because:
| 1. | It is easier to remove electrons from p - a subshell than a filled s - subshell. |
| 2. | The s-electron can be removed easier than the p-electron. |
| 3. | Ionization enthalpy decreases with an increase in atomic number. |
| 4. | Ionization enthalpy increases along the period. |
Difference between electron gain enthalphy and electronegativity is described by :
| 1. | Valence electrons | 2. | Atomic size |
| 3. | Atomic radii | 4. | Atomic number |
Incorrect statement about metal is:
1. Metals can donate electrons.
2. Metals form ionic compounds.
3. Metals are more electronegative.
4. Metals have less ionization energy.
Which group contains elements that exist as a non-metal, liquid, and gas at room temperature?
| 1. | 15 | 2. | 14 |
| 3. | 18 | 4. | 17 |
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