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
Butoxors [25]
3 years ago
9

Which statement accurately describes the atoms of a specific element?

Chemistry
2 answers:
s2008m [1.1K]3 years ago
5 0

Answer: the correct answer is 100% B.  scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus.  just took the test and got it right

katrin2010 [14]3 years ago
4 0

<u>Answer:</u> The correct answer is Option D.

<u>Explanation:</u>

Atomic number is defined as the number of electrons or number of protons that are present in a neutral atom. It is represented as Z.

Z = Atomic number = Number of electrons = Number of protons

Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.

A = Mass number = Number of protons + Number of neutrons

Number of neutrons = Mass number - Atomic number

For the given options:

  • <u>Option A:</u>

Indium is the 49th element of the periodic table having mass number 115.

So, Number of protons = Number of electrons = 49

Number of neutrons = 115 - 49 = 66

Hence, this is not correctly described.

  • <u>Option B:</u>

Scandium is the 21st element of the periodic table having mass number 45

So, Number of protons = Number of electrons = 21

Number of neutrons = 45 - 21 = 24

Hence, this is not correctly described.

  • <u>Option C:</u>

Aluminium is the 13th element of the periodic table having mass number 27

So, Number of protons = Number of electrons = 13

Number of neutrons = 27 - 13 = 14

Hence, this is not correctly described.

  • <u>Option D:</u>

Zinc is the 30th element of the periodic table.

So, Number of protons = Number of electrons = 30

This atom has 30 protons inside the nucleus and 30 electrons outside the nucleus.

Hence, this is correctly described.

Thus, the correct answer is Option D.

You might be interested in
How many moles of KBr are present in 500 ml of a 0.8 M KBr solution?
faltersainse [42]

Answer:

2) 0.4 mol

Explanation:

Step 1: Given data

  • Volume of the solution (V): 500 mL
  • Molar concentration of the solution (M): 0.8 M = 0.8 mol/L

Step 2: Convert "V" to L

We will use the conversion factor 1 L = 1000 mL.

500 mL × 1 L/1000 mL = 0.500 L

Step 3: Calculate the moles of KBr (solute)

The molarity is the quotient between the moles of solute (n) and the liters of solution.

M = n/V

n = M × V

n = 0.8 mol/L × 0.500 L = 0.4 mol

4 0
3 years ago
Hey um i dont get this yall wont to help me out???
den301095 [7]
3. 9
20. 60 (1hour)
To get to 60 from 20 we multiply by three. 3 times 3 is 9.
A is true
B is true
C is true
D is true
E is false
4 0
3 years ago
What are natural resources
Angelina_Jolie [31]
Resources that come from nature, some examples include: Water, Gold, Oil, Coal, Apples, Oranges, etc. 
5 0
3 years ago
Read 2 more answers
Why is red the last color seen at sunset?
Dimas [21]
Within the visible range of light, red<span> light waves are scattered the least by atmospheric gas molecules. So at sunrise and </span>sunset, when the sunlight travels a long path through the atmosphere to reach our eyes, the blue light has been mostly removed, leaving mostly red<span> and yellow light remaining.</span>
8 0
3 years ago
Calculate the [oh−] in a solution with a ph of 12.52.
BaLLatris [955]
PH + pOH = 14

12.52 + pOH = 14

pOH = 14 - 12.52

pOH = 1.48

[OH⁻] = 10^ -pOH

[OH⁻] = 10 ^- 1.48

[OH⁻] = 0.033 M
6 0
3 years ago
Other questions:
  • A compound is found to contain 6.1% hydrogen and 93.9% oxygen. Find it’s empirical formula.
    15·1 answer
  • Does the volume change if a ballon is put in a freezer
    11·1 answer
  • 1. How many joules must be added to 10.0 g of water to raise its temperature from 10°C to<br> 15°C?
    11·1 answer
  • Which question can be answered using the scientific method ?
    8·1 answer
  • Methanol, CH3OH, formerly known as wood alcohol, is manufactured commercially by the following reaction A 1.500-L vessel was fil
    8·1 answer
  • How does the atomic arrangement of atoms lead to its crystal like structure?
    6·1 answer
  • Based on the molar masses, how can you tell that an equation is balanced?
    6·2 answers
  • Which is not a characteristic of a mineral?
    13·1 answer
  • Convert 0.64 moles of table salt (NaCl) to grams
    11·1 answer
  • The difference between Physical/Chemical properties and Physical/Chemical changes
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!