1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ruslelena [56]
3 years ago
9

What is atomic mass, atomic number, isotopes and how are all these terms related to each other?

Chemistry
2 answers:
Airida [17]3 years ago
8 0
Atomic mass deals with the number of protons and neutrons added together, atomic number deals with protons only, though isotopes can be explained like this, say you had a hydrogen atom it's one proton and one electron if you add a neutron to it, the hydrogen becomes Deuterium which is a isotope of hydrogen it's the same atom just a neutron added to it for a different atomic mass if only slightly changed
Natalija [7]3 years ago
4 0

Atomic mass is the sum of proton and neutrons

Atomic number is just number of protons

Isotopes of elements have same atomic number but different atomic mass due to difference in number of nuetrons


You might be interested in
What could be a reason for the difference between the theoretical and experimental heats of reaction
Fiesta28 [93]

Answer:

Theoretical value is the value a scientist expects from an equation, assuming perfect or near-perfect conditions. Experimental value, on the other hand, is what is actually measured from an experiment. Rarely (in fact never) are these numbers the same.

Take the area of a sheet of paper. I know that the area of a rectangle can be found by multiplying the lengths of both sides together. I can assume an 8.5x11 sheet, so I calculate exactly 93.5 square inches. This is my theoretical value. When I actually do the measurements on my paper, it turns out my paper has been slightly cut on one end, or I’m measuring with a shoddy ruler. Therefore, I might measure only 92.8 square inches. This is my experimental value. See thats it’s close, but not exact.

Expanding on this concept, quantum mechanics is so widely accepted in the scientific community because many theoretical values calculated by mathmaticians concurred with experimental values to many, many decimal places. These would be constants such as Plank’s Constant, energy levels of harmonic potentials, and energy levels of the hydrogen atom.

Explanation:

8 0
2 years ago
PLEASE HELP ME
BabaBlast [244]

Answer:47.05% is the percent yield of nitrogen in the reaction.

Explanation:

heoretical yield of nitrogen gas = x

Moles of ammonia =  

According to reaction,2 moles of ammonia gives 1 mol of nitrogen gas.

Then 2.3529 mol of ammonia will give:

of nitrogen gas

Mass of 1.1764 moles of nitrogen gas,x = 1.1764 mol × 28 g/mol=32.94 g

Experiential yield of nitrogen gas = 15.5 g

Percentage yield:

hope that help

47.05% is the percent yield of nitrogen in the reaction.

3 0
3 years ago
Calculate ∆U (the change in internal energy) for a system on which 850.00
Illusion [34]

Answer:

The heat gain by the system,

q

=

−

250

kJ

.

The work done on the system ,

w

=

−

500

kJ

.

The First Law of Thermodynamics state that

Δ

U

=

q

+

w

=

−

750

kJ

Explanation:

6 0
2 years ago
Identify, and briefly explain, two key elements needed for fossilization.<br><br>Please Help Me!!!
Yakvenalex [24]
Body elements and trace fossils I believe
7 0
2 years ago
Read 2 more answers
Silver chloride breaks down to form silver and chlorine in the presence of light. What type of reaction is this?
Vitek1552 [10]
This is the decomposition reaction, namely the reaction of photolysis.

2AgCl = 2Ag + Cl₂
7 0
3 years ago
Other questions:
  • The atmosphere is composed of several gases. The gas which is present in the largest quantity is:
    11·2 answers
  • A cual grupo pertenecen las tierras raras y los elementos representativos??​
    9·1 answer
  • By inbvbsidiejebdhene
    10·1 answer
  • What is the ph of an aqueous solution with a hydrogen ion concentration of [h ] = 9.7 × 10–4 m?
    6·1 answer
  • ?SiCl4(I) + ?H2O(I) = ?SiO2(S) + ?HCI(aq)​
    12·2 answers
  • what is the amount of charge that passes through a wire in a given period if time is the rate of electric
    12·2 answers
  • Please help me out! :))
    12·1 answer
  • Heyyy, please help, I only need the sentences for the words please. Thank uuu :)
    8·2 answers
  • Help please!!!!!!!!! :(
    6·2 answers
  • PLEASE! 46 POINTS!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!