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
wel
2 years ago
12

The sum of the number of proteins and neutrons in an atoms nucleus is its __________ ___________.

Chemistry
2 answers:
otez555 [7]2 years ago
8 0

Answer:

Mass Number

Explanation:

In nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom.

Please vote brainliest!

marishachu [46]2 years ago
4 0

Answer:

mass number

Explanation:

The mass number refers to the sum of the number of protons and neutrons present in the nucleus of an atom and denoted by A.

Mass number = Number of protons + Number of neutrons.

You might be interested in
Assume the following is a neutral atom.
Lena [83]

Answer:

2. carbon

Explanation:

carbon should be the answer

4 0
3 years ago
Which one of the following solutions would have a pH value greater than 7?
Sliva [168]

Answer:

The 2 one

Explanation:

7 0
2 years ago
A certain food web is made up of turtles, pond weeds, water fleas, and tadpoles. Which organism is most likely the producer in t
Simora [160]
The pond weeds are the producers because they are a plant
6 0
2 years ago
Read 2 more answers
The half-life of nitrogen-13 is 10.0 minutes. if you begin with 53.3 mg of this isotope, what mass remains after 25.9 minutes ha
zimovet [89]

Hello!

The half-life is the time of half-disintegration, it is the time in which half of the atoms of an isotope disintegrate.

We have the following data:

mo (initial mass) = 53.3 mg

m (final mass after time T) = ? (in mg)

x (number of periods elapsed) = ?

P (Half-life) = 10.0 minutes

T (Elapsed time for sample reduction) = 25.9 minutes

Let's find the number of periods elapsed (x), let us see:

T = x*P

25.9 = x*10.0

25.9 = 10.0\:x

10.0\:x = 25.9

x = \dfrac{25.9}{10.0}

\boxed{x = 2.59}

Now, let's find the final mass (m) of this isotope after the elapsed time, let's see:

m =  \dfrac{m_o}{2^x}

m =  \dfrac{53.3}{2^{2.59}}

m \approx \dfrac{53.3}{6.021}

\boxed{\boxed{m \approx 8.85\:mg}}\end{array}}\qquad\checkmark

I Hope this helps, greetings ... DexteR! =)

3 0
3 years ago
5. __NH3 + __O2 >>>>>__ NO +__ H20
inn [45]
2 NH3+ 2 O2 —> 2 NO+ 3 H2O
5 0
3 years ago
Other questions:
  • When a 14.2-g sample of mercury (II) oxide is decomposed into its elements by heating, 13.2 g Hg is obtained. What is the percen
    10·1 answer
  • What is the value of the activation energy of the uncatalyzed reaction? Express your answer to three significant figures and inc
    12·2 answers
  • The compound, nah2po4, is present in many baking powders. what is its name? sodium phosphate sodium bephosphate sodium dihydroge
    15·1 answer
  • How do lawmakers make good environmental decisions??
    15·1 answer
  • What is the best definition of energy?
    13·2 answers
  • Which equation shows how to calculate how many grams (g) of KOH would be needed to fully react with 4 mol Mg(OH)2? The balanced
    6·2 answers
  • 1. Complete the following sentences:
    10·1 answer
  • The weather in an area is affected mostly by interactions between what elements?
    11·1 answer
  • 17. A sample of oxygen gas has volume 150.0 mL, at 0.947 atm, what will be the volume of the gas at 750.12 mm of Hg if temperatu
    10·1 answer
  • Explain three reasons why potassium is larger than sodium.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!