Elements and compounds

Question 1

Compound

Answer 1

A compound is a substance with two or more types of atoms which are chemically bonded together

In compounds, atoms are held together with strong chemical bonds. Compounds are therefore difficult to separate due to their chemical bonds. .Elements can only be separated out from compounds by a chemical reaction

Question 2

Element

Answer 2

An element is a substance that is made of only one type of atom.

Question 3

Molecule

Answer 3

Two or more atoms chemically bonded together. The smallest unit of a substance that retains the composition and properties of that substance.

Question 4

What are the two types of molecules. A little information on both

Answer 4

Elemental: a molecule made of atoms of the same elements chemically bonded, same-sized atoms.

Molecules of a compound: a molecule made of two or more different elements.

Question 5

Difference between a molecule and compound

Answer 5

A molecule is a group of two or more atoms held together by chemical bonds. A compound is a substance which is formed by two or more different types of elements which are united chemically in a fixed proportion. A molecule is the chemical

Question 6

Atom number- where is it found, how is it counted

Answer 6

Number of protons in a nucleus of an atom. This number is used to define elements.

Question 7

Atom mass- how is it counted

Answer 7

atomic mass is the average number of protons and neutrons in the nucleus of an atom. Electrons are not counted in the atomic mass because they are so small that they have almost no effect on the mass. atomic mass is the average mass of all atoms of a single element.

Question 8

Chemical Symbol

Answer 8

1 or 2 letters are used to identify an element, like Fe (iron) or Au (Gold).

Question 9

What arrangements can elements be found in

Answer 9

As single atoms, called monatomic substances.

As groups of chemically bonded atoms, called molecules.

As large, three-dimensional grids, called lattices.

Question 10

What is chemical energy

Answer 10

Energy stored inside a chemical bond

Question 11

What is a chemical bond

Answer 11

The bond attracting two atom or more atoms to one another

Question 12

What is the mass number

Answer 12

The mass number is the total count of protons and neutrons in an atom. mass number is the mass of individual atoms

Question 13

What is a lattice

Answer 13

repeating structure of atoms, a solid structure of atoms. It contains only one type of bond, and therefore cannot be separated into individual molecules, rather separated into atoms