Tag: hydrogen in periodic table

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Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

Hydrogen does not combine with ______.

  1. Sb

  2. Na

  3. He

  4. Zn
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Since Helium (He) is a noble gas and does not combines with hydrogen. Because bond formation is only favored when the final state of the two elements is more stable than their initial state. If a hydrogen atom bonded with a helium atom, neither of their 1s and 2s atomic orbital will be half/fully filled, which causes both atoms to be energetically unstable. Such compound will most likely break down immediately back to their respective atomic state.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

Hydrogen exists in atomic state in which of the following compounds?

  1. Metallic hydrides

  2. Ionic Hydride

  3. Molecular hydrides
  4. ${ H } _{ 2 }O$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Metal hydrides are metals which have been bonded to hydrogen to form a new compound. Any hydrogen compound that is bonded to another metal element can effectively be called a metal hydride. Generally, the bond is covalent in nature, but some hydrides are formed from ionic bonds.
  • Hence option A is a correct answer.
Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

________ element has one electron in the outermost shell and attains duplet configuration after accepting one more electron and attains stability.

  1. Helium

  2. Hydrogen

  3. Lithium

  4. Carbon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrogen has ${ 1e }^{ - }$ in outermost shell, in order to achieve stability either ${ e }^{ - }$ to be removed or added. When added it acquires a stable configuration forming duplet.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

Hydrogen is the ________ element on the earth.

  1. most abundant

  2. heaviest

  3. lightest

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$H$ is the lightest element on earth as there is only $1$ proton and ${ 1e }^{ - }$. All the other elements have more than 1 electrons and protons along with neutrons.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

Assertion (A): Hydrogen shows resemblance with alkali metals as well as halogens.
Reason (R): Hydrogen exists in atomic form only at high temperature.

  1. Both A and R are true and R is the correct explanation of A

  2. Both A and R are true but R is not a correct explanation of A

  3. A is true but R is false

  4. A is false but R is true
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrogen is having similarities with alkali metals and halogens any many properties and hydrogen exists In atomic form in high temperature but the reason not satisfy the assertion so assertion and reason are true.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

In which of the following properties listed below, hydrogen does not show similarity with halogens?

  1. Nature of the oxide

  2. Electropositive character

  3. Combination with alkali metals

  4. Atomicity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Halogens are highly electronegative and form anions, whereas hydrogen can form both H+ and H- but is generally considered to have a different electropositive character than halogens.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

In which property listed below hydrogen does not resemble alkali metals?

  1. Tendency to form cation

  2. Nature of oxide

  3. Combination with halogens

  4. Reducing character
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrogen shows all other properties like alkali metals (form cation, combine with halogens, reducing nature) but nature of oxide is different than metals.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

The characteristics of hydrogen resemble the elements of__as well as__groups.

  1. IIA and VA

  2. IIIA and VIA

  3. IIA and VIA

  4. IA and VIIA
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Because hydrogen has ${ 1e }^{ - }$ in its outermost shell which is ready to be donated like that a group $1A$ (alkali metals). Also hydrogen can accept an ${ e }^{ - }$ to from ${ H }^{ - }$ having ${ 2e }^{ - }$ in outer shell which is stable this resembles to $VIIA$ group (Halogen family), as they also require only one ${ e }^{ - }$ to fulfill their incomplete octet.