Primary chemical bonds

Covalent bond is formed between...

• atoms

• cations and anions

• molecules

• metals

In dative covalent bonds, the donor atom...

• accepts 2 electrons

• gives 1 electron

• gives 2 electrons

• accepts 1 electron

Find the true statement about pi bond.

• The first two bonding electrons form this bond

• This bond is stronger than the other type of covalent bond

• Between two atoms, there can be maximum 3 of this type of covalent bond

• These bonds can be found above & below+ in front of & behind the other type of bond

If the bonding electron pair is attracted by more than two nuclei, it is called a...

• dative covalent bond

• sigma bond

• delocalized bond

• pi bond

Choose the false statement about resonance forms

• These are fictive structures, none of them describe the true structure perfectly

• They are required when only one Lewis-dot structure is not enough to describe the structure

• The actual structure of a molecule is the subtraction of these resonance forms

• The actual sturcture of a molecule is called resonance hybrid

Molecules are...

• negatively charged

• positively charged

• neutral

• their charge depends on the circumstances

Choose the false statement about molecules.

• Atoms would like to achieve the noble gas electron configuration

• Atoms form bonds with each other to be more stable

• A molecule can contain more than two atoms

• A molecule cannot contain only one type of atoms

Choose the false statement about ionic bond.

• It can be found between ions

• If the EN difference < 2.1 between two atoms, this bond can form

• This is the primary bond between K and Br.

• This is the primary bond between F and Fr.

What is the maximum number of sigma bonds between two atoms?

• 1

• 2

• 3

• 0

Find the true statement about metallic bond.

• A metal kernel contains the nucleus and two electrons in every cases

• It is formed between ions.

• Metal kernels are surrounded by delocalized electrons.

• Metal kernels can be represented by negative symbols.