ch 2 part 1 reviews

Question 1

chapter 2

Answer 1

the chemistry of biology

Question 2

Everything is made of ___________

Answer 2

atom

Question 3

a bit of matter that can not be subdivided any further without losing its essential properties

Answer 3

atom

Question 4

anything that has mass and takes up spaces

Answer 4

matter

Question 5

is substance that cannot be break down chemically into any other substance

Answer 5

element

Question 6

atomic structure has two reigions :

Answer 6

internal : Nucleus which contains proton and neutron
external : Outer region containing electron that orbit nucleus

Question 7

all the element has neuntron except :

Answer 7

hydrogen

Question 8

the number of _____________ in an atom determines its atomic number in the Periodic Table

Answer 8

proton

Question 9

there is attraction between the positve charged nucleus negatively charged electron holds ____________

Answer 9

electron in orbit around the nucleus

Question 10

atomic number :

Answer 10

proton , distinguish one element from another

Question 11

atomic mass :

Answer 11

the combined mass of the proton and neutrone

Question 12

in most atoms :

Answer 12

proton=neutron=electron

Question 13

can you indicate to periodic table
atomic number etc :

Answer 13

Question 14

Atoms with the same number of protons but different number of neutrons

Answer 14

Isotopes

Question 15

isotopes charcteristic :

Answer 15

same atomic number and different atomic weight and mass

Question 16

an isotope with atomic nuclei that are not stable and break down spontaneously

Answer 16

radioactive atom

Question 17

atoms are radioactive which means:
energy that’s released is ________

Answer 17

release tiny high speed particles that carry energy when they break down :
radiation

Question 18

the big four in you body :

Answer 18

oxygen , carbon , hydrogen , nitrogen

Question 19

__________________determine whether, and how, the atom will bond with other atoms

Answer 19

An atom’s electrons