The electron cloud model describes which of the following?
the negative charge of the electron
the trails left by an electron as it moves around the nucleus
the group of protons that are in the nucleus
the neutron orbital
2nd question:
if an oxygen atom has 8 protons and 10 neutrons in its nucleus, what is its atomic number?
18
10
8
not enough information to calculate
3rd question:
if an atom loses a neutron, what happens?
its mass stays the same, and it becomes a different element.
its mass stays the same, and it is still the same element.
its mass is lowered, and it becomes a different element.
its mass is lowered, but it is still the same element.
Answers: 2
Chemistry, 22.06.2019 08:00
Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.
Answers: 1
Chemistry, 22.06.2019 16:50
Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 1
Chemistry, 22.06.2019 21:30
If 22.5 of nitrogen at 748 mm hg are compressed to 725 mm hg at constant temperature. what is the new volume?
Answers: 1
The electron cloud model describes which of the following?
the negative charge of the e...
the negative charge of the e...
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