Biology questions!?!?!?!?!?!?

Question

Q1The mass number if an element can be easily approximated by adding together the number if_________ in an atom of that element.

a. protons and neutrons
b. energy levels
c. protons and electrons
d. neutrons and electrons
e. isotopes

Q2 What is the approximate atomic mass of an atom with 16 neutrons, 15 protons, and 15 electrons?

a. 15 daltons
b. 16 daltons
c. 30 daltons
d. 31 daltons
e. 46 daltons



Q3 oxygen has an atomic number of 8 and a mass of 16. thus, the atomic mass of an oxygen atom is

a. exactly 8 grams
b. exactly 8 daltons
c. approximately 16 grams
d. approximately 16 daltons
e. 24 amu (atomic mass units)

Answer 1

Q1. A. The mass number of an element is the number of protons plus the number of neutrons



Q2. D (15+16)



Q3. D

Answer 2

Q1 : a. protons and neutrons



Q2 : d. 31 Dalton's



Q3 : d. approximately 16 daltons

Answer 3

This is a chem question first off.



Q1A

Q2 D

q3 D

Answer 4

These aren't biology questions.

Answer 5

These are chemistry questions.