01- Themes and biology/chemistry of element

Question 1

Atom

Answer 1

smallest unit of matter that still retains the properties of an element

Question 2

Proton

Answer 2

Subatomic particle with a positive electrical charge (+1)

Question 3

Neutron

Answer 3

neutral subatomic particle/ makes up nucleus of every atom

Question 4

Electron shell

Answer 4

outside part of an atom around nucleus

Question 5

valence electrons

Answer 5

electrons in outermost shell

Question 6

ion

Answer 6

an atom or molecule with either positive or negative charge

Question 7

element

Answer 7

is a substance that cannot be broken to other substances by chemical reactions

Question 8

molecule

Answer 8

The smallest particle of a substance that has all of the physical and chemical properties of that substance

Question 9

What is an example of an element?

Answer 9

Oxygen is an important biological element

Question 10

What is an example of a molecule?

Answer 10

A common example of a molecule is water (H2O), which is made up of two hydrogen atoms and one oxygen atom bonded together; other examples include carbon dioxide (CO2), oxygen (O2), and nitrogen (N2)