Chemistry Of Life

Question 1

Smallest stable unit of matter

Answer 1

Atoms

Question 2

Atoms are composed of…

Answer 2

Smaller subatomic particles.

Question 3

Found in the nucleus and have a positive charge

Answer 3

Protons

Question 4

Found in the nucleus and has no charge (neutral)

Answer 4

Neutrons

Question 5

Orbit around the nucleus and have a negative charge

Answer 5

Electrons

Question 6

How many electrons can each orbital hold?

Answer 6

2 electrons

Question 7

Orbitals grouped into levels

Answer 7

Electron shell

Question 8

The number of electrons in the outer most electron shell will determine if…

Answer 8

An atom will react with another atom.

Question 9

What is the status of the atom if they’re valence shell are filled?

Answer 9

They are not reactive, they are stable.

Question 10

What do atoms do if they need electrons to complete their valence shell?

Answer 10

They are active, And will participate in chemical reactions.

Question 11

Number of protons in an atom. Determines the element.

Answer 11

Atomic number

Question 12

Number of protons + neutrons

Answer 12

Mass number

Question 13

The number of protons equals to…

Answer 13

The number of electrons if the atom has not participated in a chemical reaction.

Question 14

A substance that cannot be divided into different substances; composed of only one type of atom

Answer 14

Element

Question 15

What are the four major elements that makes up 96% of the body?

Answer 15

Carbon, Hydrogen, nitrogen, and oxygen.

Question 16

What are the major mineral of the body?

Answer 16

Calcium, potassium, sodium, phosphorous, chlorine, magnesium, iron, zinc, iodine, and copper

Question 17

Combination of 2 or more atoms

Answer 17

Molecule

ex.) H20

Question 18

Combination of 2 or more different atoms

Answer 18

Compound

ex.)NaCl

Question 19

Atoms that contains the same number of protons but different mass numbers

Answer 19

Isotope

Ex.) carbon 13 has 6 protons and electrons, but 7 neutrons

Question 20

Some isotopes emit subatomic particles

Answer 20

Radioisotopes

Question 21

In order to fill the outer energy level, atoms will react with one another, forming this type of bond. Electrons may be shared, borrowed or donated. This process can form molecules or compounds

Answer 21

Chemical bonds

Question 22

Formed when one atom gives up a electron(s) with one atom

Answer 22

Ionic bonds

Question 23

When opposites charges attract the ions to one another, it forms…

Answer 23

Ionic bonding

Question 24

What is the status of ionic bonding, and what forms when dissociates in water?

Answer 24

Ionic bonds are not stable, when they dissociate in water, electrolytes are formed

Question 25

Formed when atoms share electrons; energy levels overlap

Answer 25

Covalent bonds

Question 26

What is the importance on the ions in a covalent bonding?

Answer 26

No ion are formed.

Question 27

What is the strength of covalent bonding and what would happen if they react with water?

Answer 27

Covenant bonds are strong and do not dissociate in water

Question 28

A weak attractive force between hydrogen and either oxygen or nitrogen atoms.

Answer 28

Hydrogen bonds

Question 29

How weak are hydrogen bonding?

Answer 29

Hydrogen bonds are not strong enough to form a molecule.

Question 30

Hydrogen bond is common in water; creates surface tension

Answer 30

Cohesive nature