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
Citrus2011 [14]
3 years ago
12

An atom has 25 protons,20 neutrons, and 19 electrons.Which atom is this,What is the atom's mass number?

Chemistry
2 answers:
ladessa [460]3 years ago
6 0
The atomic mass is 45
Arte-miy333 [17]3 years ago
3 0
The atom is manganese
You might be interested in
Jeffrey is making a model of tungsten for his chemistry class. He has foam balls for the protons, neutrons, and electrons. He ha
mrs_skeptik [129]

Atomic number (Z) of tungsten is 74

Mass number (A) of tungsten is 184

Now:

Atomic number of an element = Number of protons = Number of electrons

Mass number = Number of Protons + Number of neutrons

In the case of tungsten

Total Number of electrons = 74

Jeffrey has already added 21 electrons

Number of electrons needed = 74 - 21 = 53

Ans (D) 53 more electrons are needed to complete the neutral atom of tungsten.

8 0
2 years ago
the symbol for xenon (xe) would be a part of the noble gas notation for the element antimony. cesium.
trapecia [35]

The symbol for xenon (xe) would be a part of the noble gas notation for the element cesium.

For writing the electronic configuration of any element by using the preceding noble gas configuration, we simply use the symbols of noble gas belongs to the previous period of that particular elements. We can't use the symbol of noble gas of same period from which the element belong.

A is the wrong option because the noble gas in the preceding period to the period from which antimony belongs is krypton.

The actual electronic configuration of antimony is as follow:

[Kr] 4d10 5s2 5p3

B is correct option because the noble gas in the preceding period to the period from which Cesium belongs is Xenon.

The actual electronic configuration of Cesium is as follow:

[Xe] 6s1

Thus, we concluded that the symbol for xenon (xe) would be a part of the noble gas notation for the element cesium.

learn more about Noble gas:

brainly.com/question/2094768

#SPJ4

8 0
1 year ago
When sodium and oxygen react to form an ionic compound, the mass of the compound ____ the sum of the masses of the individual el
Anna007 [38]
Hi Lara

The answer is : C

Is equal to


I hope that's help!
5 0
3 years ago
Read 2 more answers
The quantity 0.0000064 g expressed in Scientific notation is
SOVA2 [1]
6.4 times 10^-7 is the answer because you are moving your decimal places to the left so it will be negative 7
3 0
3 years ago
Read 2 more answers
What do you think is happening at the nanoscale that keeps the salad dressing with an emulsifier mixed?
saveliy_v [14]

Answer:

✨ science ✨ and ✨ big brain stuff ✨

Explanation:

sorry

4 0
2 years ago
Other questions:
  • What is a factor that can influence the rate of a nuclear decay reaction?
    11·1 answer
  • What would happen if our atmosphere consisted of pure oxygen
    7·2 answers
  • How do I balance this equation? (Number 2)
    5·1 answer
  • What is the tiny structure inside a cell
    7·1 answer
  • You are experimenting to find out if fertilizer makes a plant grow taller. What would be an appropriate control group for this e
    9·1 answer
  • Is hydrofluoric acid stronger than acetic acid?
    9·1 answer
  • What is the grams of molar mass of magnesium
    12·2 answers
  • HELP ME!!!!
    7·1 answer
  • This is the chemical formula for acetone: CH32CO. Calculate the mass percent of carbon in acetone.
    15·1 answer
  • Am I doing this right?<br><br> What is [OH-] of a solution<br> with a pH of 4.0?<br><br> Answer in M
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!