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
Pie
3 years ago
16

The model below shows an atom of an element. 10 light gray and 8 dark gray balls sit at the center with 2 concentric black rings

around them. The inner ring has 2 medium gray balls on it, and the outer ring has 6 medium gray balls on it. At bottom, a dark gray ball = +1, a light gray ball = 0, a medium gray ball = negative 1. What is the atomic number of this atom? A. 6 B. 8 C. 9 D. 16
Chemistry
2 answers:
MA_775_DIABLO [31]3 years ago
9 0

Answer:

The Atomic Number of the atom of an element whose model is given is "8" that is option no. 'C' in the question.

Explanation:

An Atom comprises of 3 basic structures that are Protons, Neutrons and Electrons. The central part is the Nucleus which contains protons and neutrons having positive charge and no charge respectively. The electrons are revolving around the nucleus in electronic shells having the negative charge.

<u><em>ATOMIC NUMBER: </em></u>

Atomic number is the number of protons present inside the nucleus of an atom and it determines the place of that particular atom in the <u>Periodic Table.</u>

In the model, given in the question, the nucleus contains 2 types of balls dark gray colored and light gray colored. The key at the bottom shows the dark gray colored ball as having a positive charge and thus it represents the atomic number for the given atom of element which is <u><em>EIGHT (8).</em></u>

So, the atomic number for the given atom is 8 which is element OXYGEN.  

Juliette [100K]3 years ago
6 0

Answer:

8

Explanation:

i just counted the protons which is the same number as the electrons .___.

You might be interested in
What is the formula for germicide that is sufficient to kill blood-borne pathogens?
Colt1911 [192]
It is 1 ounce. Bloodborne Pathogens can be transmitted when blood or body liquid from a tainted individual enters someone else's body by means of needle-sticks, human chomps, cuts, scraped areas, or through mucous films. Likewise, semen, vaginal discharges and salivation in dental methods are considered conceivably tainted body liquids.
7 0
3 years ago
What element is denoted by 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d6
IrinaVladis [17]

Element 76....Osmium

6 0
3 years ago
Read 2 more answers
The more mass you have of a substance:
otez555 [7]
A beachside all objects have thermal energy but thermal energy is the sum of the energy of all the particles so the more particles the more energy.
7 0
3 years ago
Collected data consists of:
san4es73 [151]

The number of moles of the magnesium (mg) is 0.00067 mol.

The number of moles of hydrogen gas is 0.0008 mol.

The volume of 1 more hydrogen gas (mL) at STP is 22.4 L.

<h3>Number of moles of the magnesium (mg)</h3>

The number of moles of the magnesium (mg) is calculated as follows;

number of moles = reacting mass / molar mass

molar mass of magnesium (mg) = 24 g/mol

number of moles = 0.016 g / 24 g/mol = 0.00067 mol.

<h3>Number of moles of hydrogen gas</h3>

PV = nRT

n = PV/RT

Apply Boyle's law to determine the change in volume.

P1V1 = P2V2

V2 = (P1V1)/P2

V2 = (101.39 x 146)/(116.54)

V2 = 127.02 mL

Now determine the number of moles using the following value of ideal constant.

R = 8.314 LkPa/mol.K

n = (15.15 kPa x 0.127 L)/(8.314 x 290.95)

n = 0.0008

<h3>Volume of 1 mole of hydrogen gas at STP</h3>

V = nRT/P

V = (1 x 8.314 x 273) / (101.325)

V = 22.4 L

Learn more about number of moles here: brainly.com/question/13314627

#SPJ1

7 0
1 year ago
In a exothermic reaction, is heat transfered to or from the surrounding
Monica [59]
In an exothermic reaction, heat is transferred to the surrounding.

Hope this helps, have a great day ahead!
7 0
3 years ago
Read 2 more answers
Other questions:
  • If 2a=3b and a=6 then b=
    5·2 answers
  • What is ductility in a solid?
    7·1 answer
  • A substance placed in a container has a fixed volume and takes up the shape of the container. In which state does this substance
    9·1 answer
  • In the winter, a heated home in the Northeast might be maintained at a temperature of 78°F. What is this temperature on the Cels
    5·1 answer
  • Friction depends on the types of surfaces involved and how hard the surfaces push together.
    11·2 answers
  • Why must reagent bottles be closed when not in use?
    6·1 answer
  • A student needs 500 mL of a 1.5 M solution of NaCl for an experiment. How many moles of NaCl should she use?
    9·1 answer
  • An organic compound (A) reacts with HCN to give (B). On hydrolysis of (B) in acidic medium gives (C). Compound (A) also produces
    14·1 answer
  • Question 2 (1 point)
    12·1 answer
  • Which type of bonding involves the sharing of electrons, in which the electrons are confined close to the more electronegative e
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!