1. The mass number of an atom is obtained by totaling the number of_____and____.
a. electrons and protons
b. electron and neutrons
c.protons and neutrons
d.neutrons and isotopes
Is it B?
2. Which of the following statements about the chemical combinations of atoms to form compounds is NOT true. a. compounds form when atoms are more stable in a combined form.
b. when atoms combine,they gain, lose, or share electrons.
c. when atoms combine,they are at lower energy state.
d. compounds form when atoms are less stable in a combined form.
Is it C?
That's what Damon said. By the way, he's a retired physics professor from MIT.
Please read more carefully before you post answers here, Sophya.
1. NO! it is not B
The atomic number is number of protons.
The atomic mass is protons plus neutrons.
The mass of electrons is tiny in comparison
2. If they were less stable in combined form why would they combine?
Damon no it would be A my Aunt is a scientist
Yes, what I said agrees with her aunt luckily. Although my undergraduate degree is in physics my doctorate is in engineering and I was an engineering professor at MIT :)
A is true, and I am sure that is what her aunt said. However the question is what is NOT true.
I dont know about you... BUT! Just cause you say you're a retired professor doesn't mean you are, not that I am saying you're not and that you are wrong. You might be who you say you are. But now that I am looking at the dates you're messages were send I am having second thoughts, are you sure you're not the same person?
the whole test answers 1-13
a
b
b
d
c
a
a
a
b
d
b
b
c