SCIENCE SECOND QUARTER

What best describes Bohr's atomic model?

Electrons occupy orbits, whose energy increases with increasing distance from the nucleus.

What is a common aspect of Bohr’s model and the quantum mechanical model?

Electrons have a discrete amount of energy.

What are valence electrons?

The electrons in the outermost energy level of an atom.

Why do most atoms bond with other atoms?

To attain stability.

When is an anion formed?

When a neutral atom gains electrons.

Which pair of elements can form ionic bonds?

Metal and non-metal.

Which pair of elements can form covalent bonds?

Two non-metals.

What type of bond is formed when two atoms share electrons equally?

Non-polar covalent bond.

What type of bond is formed when atoms transfer electrons?

Ionic bond.

Which of the following does not correctly describe metals?

Low melting and boiling points.

Which of the following is an organic compound?

Ethyne.

Carbon is capable of bonding with a maximum of how many atoms?

Hydrocarbons that contain at least one double bond and no triple bonds are classified as?

Alkenes.

A compound whose general formula is R - COOH is classified as a?

Carboxylic acid.

Carbon compounds with the general formula CnH2n+2 are called?

Alkanes.

Alkenes and alkynes are best described as what type of hydrocarbons?

Unsaturated.

Which compounds are commonly used as fuels?

Hydrocarbons.

What type of compound is responsible for many of the pleasant smells of fruits?

Esters.

Which of the following is responsible for the characteristic properties of hydrocarbon derivatives?

Functional group.

Which type of compound contains nitrogen?

Amines.

What type of hydrocarbon is represented by the chemical formula HC=C-CH2CH3?

Alkene.

Which pair of compounds contains the carbonyl group?

Aldehydes and ketones.

How many atoms are there in 1 mole of an element?

6.002x10^23.

What is the mass of 1 mole of silver?

107.9 g.

The molar mass of an element is numerically equal to its?

Atomic mass.

What shows the smallest whole-number ratio of the atoms in a particle unit of a compound?

Empirical formula.

Which statement is correct about diatomic oxygen and carbon dioxide?

They weigh the same.

Who suggested that atoms can be counted?

Amadeo Avogadro.

What does one mole of a substance correspond to?

Molar Mass.

What unit is used for molar mass?

g/mol.

Who is known for inventing devices that detect and quantify substances?

Dr. Fortunato Sevilla 3.