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
yulyashka [42]
2 years ago
15

Selah is making a mobile of an atom of beryllium to hang from the ceiling in her science class. She uses a clear plastic bag for

the nucleus and fills it with white foam balls for protons and black foam balls for neutrons. She suspends blue foam balls from strings around the nucleus to represent the electrons. Which diagram shows Selah's model?
Chemistry
1 answer:
mel-nik [20]2 years ago
7 0

Answer:

See explanation

Explanation:

The question is incomplete because the images of the models are absent. However, i will try to give you a general description of what the correct answer should be.

Beryllium is a member of group 2 in the periodic table. Beryllium has an atomic number of 4. This implies that it has four protons in its nucleus and four electrons in its shells. In a neutral atom, the number of electrons on the shells is equal to the number of protons in the nucleus.

The electronic configuration of Beryllium is 1s2 2s2. This implies that it should have two shells each containing only two electrons each.

Since we are using white foam balls for protons and black foam balls for neutrons, the clear plastic will contain four white foam balls and five  black foam balls since the mass number of beryllium is 9 and number of neutrons = mass number - number of protons.

Four blue foam balls hanging from strings will represent the electrons around the nucleus.

Any model that corresponds to the description above is the correct answer.

You might be interested in
I really need help with this. Be serious. If you answer something random just for the points I will report you to brainly.
sashaice [31]

Answer:

It get thicker beacause the mid ocean

Explanation:

Because when it gets moved back the heat rises and it builds up to be thicker.

8 0
2 years ago
When dilute HCL is added to zinc pieces taken in a test tube​
Romashka-Z-Leto [24]

Answer:

zince chloride will be formed and hydrogen gas will be librated.

Explanation:

When dilute HCl is added to zinc pieces, a rection will takes place as follows :

Zn+HCl\rightarrow ZnCl_2+H_2

It means that zinc chloride will form when zinc reacts with dilute HCL. Also hydrogen gas will produced.

As zinc is more reactive than hydrogen, it displaces hydrogen from its solution and forms zinc chloride. The form product is white in color and H₂ is an odorless gas.

Hence, zince chloride will be formed and hydrogen gas will be librated.

6 0
3 years ago
What determines the speed at which a particle of matter moves
Zepler [3.9K]

Answer:

The force exerted on it.

Explanation:

As the law of motion states, an object at rest will remain at rest an object in motion will remain in motion unless acted upon by another force.

5 0
3 years ago
The crater is the bowl-shaped area around a volcano’s central vent. t/f
Lyrx [107]
If I'm correct, the crater is actually a circular-shaped area around the volcano's central vent. My answer is false
6 0
3 years ago
Predict which one of the following compounds would be insoluble in water.
quester [9]
CH4 is insoluble in water 
4 0
3 years ago
Read 2 more answers
Other questions:
  • Consider the oxidation of sodium metal to sodium oxide described by the balanced equation: 4 na + o2 ? 2 na2o. if 2.55 mol of so
    13·1 answer
  • what is the approximate area of a regular pentagon with a side lenghtt of 6 feet and a distance from the center to a vertex of 6
    7·1 answer
  • What product of Al makes it suiyable to be used in electric cables
    13·1 answer
  • How many moles of methane are produced when 82.6 moles of carbon dioxide gas react with excess hydrogen gas?
    7·1 answer
  • Is potential or kinetic energy affected by mass?
    5·2 answers
  • (g) The mole fraction of O2 in atmospheric air is 0.21. Calculate the concentration of O2 in a sample of atmospheric air in a 10
    15·1 answer
  • How much pressure (in atm) would be found in 5.8 moles of an ideal gas at 358 K and volume of 3.9 L?
    6·1 answer
  • How to cook brainly?<br> ps:e
    15·1 answer
  • How many moles of na contain 7.88x1021 atoms of na
    8·1 answer
  • Write balanced nuclear equations for the following:(b) Alpha decay of polonium-218
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!