Front

An element X reacts with chlorine to form a solid of formula XCl. What could be the electronic structure of X? Options: 1s² 2s² 2p⁴, 1s² 2s² 2p⁶ 3s¹, 1s² 2s² 2p⁶ 3s², 1s² 2s² 2p⁶ 3s² 3p⁵

Back

1s² 2s² 2p⁶ 3s¹

Front

Which solid does not contain covalent bonds? Options: Ice, Diamond, Silver, Sulfur

Back

Silver

Front

Which is a compound that has giant molecular structure? Options: carbon dioxide, sulfur dioxide, graphite, silicon dioxide

Back

silicon dioxide

Front

The diagram below shows the arrangement of ions in a compound. Which is the simplest formula of this compound? Options: M₂X, MX, MX₂, MX₆

Back

MX

Front

Valence electrons of P and Q in covalent molecule PQ₂? Options: P (4) , Q(6); P(4), Q(7); P(6), Q(7); P(6), Q(8)

Back

P(6), Q(7)

Front

What is the total number of electrons in the covalent bonds surrounding the sulfur atom in sulfuric acid? Options: 4, 6, 8, 12

Back

12

Front

Which element is not able to form compounds by either sharing or transferring electrons? Options: oxygen, fluorine, hydrogen, magnesium

Back

magnesium

Front

Three elements, X, Y, and Z have consecutive increasing proton numbers. If element Y is a noble gas, what will be the formula of the compound formed by X and Z?

Back

ZX

Front

Possible electronic configurations of elements X and Y in a molecule structure.

Back

X: 1s²2s²2p³ , Y: 1s²2s²2p⁶3s²3p⁵

Front

Which statement gives the most accurate description of metallic bonding?

Back

Positive ions in a “sea” of free-moving electrons.