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
Mashutka [201]
2 years ago
9

3. The number of electrons and neutrons in an atom are 13 and 14, respectively. Find out the mass number, atomic number, valency

, and symbol of the element.
​
Chemistry
1 answer:
QveST [7]2 years ago
7 0

Answer:

Explanation:

3. The number of electrons and neutrons in an atom are 13 and 14, respectively. Find out the mass number, atomic number, valency, and symbol of the element.

For a neutral atom. number of protons =number of electrons=13

so since atomic number is the number of protons =13

mass number = protons + neutons =14+13 = 27

atomic number 13 is Aluminum (AL-(see periodic table)

The electronic structure for 13 electrons is 1s2s2p63s23p1

so Al has 3 electrons which are VALIENT and can react and when it loses the 3 it will have  CHARGE OF +3

You might be interested in
Does chocolate milk come from brown cows?
ss7ja [257]
Chocolate milk is just regular white milk that has chocolate syrup/powder mixed into it
So no, chocolate milk does not come from brown cows

Hope this helps
4 0
3 years ago
Read 2 more answers
A balance reads an object A to be 45.1 kg. The balance reads another object B to be 33.46 kg. What is the total weight of both o
postnew [5]

Answer:

The total weight of both object is 78.56 kg.

Explanation:

Given data:

Mass of object A = 45.1 kg

Mass of object B = 33.46 kg

Total weight of object = ?

Solution:

Total weight of both subject must be the sum of weight of object A and B.

Total weight of objects = weight of object A + weight of object B

Now we will put the values of mass of object A and B.

Total weight of objects = 45.1 kg + 33.46 kg

Total weight of objects =78.56 kg

Thus the total weight of both object is 78.56 kg.

7 0
3 years ago
Magnesium reacts with a certain element to form a compound with the general formula MgX. What would the most likely formula be f
ziro4ka [17]

Answer:K2X

Explanation: Valency can be defined as the combining power of an element. It is the valency that dictates the value an element will have when writing a chemical formula for its compound.

MgX is a compound of magnesium and an element X. The valency of magnesium in most of its compound is +2. Now for the 2 to have been absent in the chemical formula, this shows that the element X itself have a valency if -2 for the valencies of both to have canceled out.

Now considering the element potassium, it is an alkaline metal belonging to group 1 of the periodic table. Hence, it is expected that it has a valency of +1

Forming a compound with element X means there would be an exchange of valencies between the two. We have established that x has a valency of -2. The formula of the compound thus formed by exchanging the valencies of both element would be K2X

7 0
2 years ago
Read 2 more answers
Calculate the mass of magnesium oxide formed when 3.0 grams of magnesium reacts with excess oxygen.
BlackZzzverrR [31]
Mg+O2=MgO
24 g. = 40 g
3 g. = x
x =  \frac{3 \times 40}{24}  \\ x = 5 \: g
3 0
3 years ago
Describe what you know about the motion of particles.
garik1379 [7]

The motion of particles can be changed by the temperature you put it at.

7 0
3 years ago
Other questions:
  • Use bond energies to determine δhrxn for the reaction between ethanol and hydrogen chloride. ch3ch2oh(g)+hcl(g)âch3ch2cl(g)+h2o
    10·1 answer
  • HELP ASAP PLZZZ!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    6·2 answers
  • How many oxygen are present in 2.50 mol of oxygen atoms?
    15·1 answer
  • 2. Report each of the following quantities to 3 significant figures. Use standard notation if possible, or
    12·1 answer
  • Please complete the sentence. Matter can be classified as a(n) ____________ or a(n) ________________?
    11·2 answers
  • Classify each property as intensive or extensive. Color, temperature, volume, hardness, mass, boiling point, length, density
    12·2 answers
  • I will give brainliest!!! What is the density of a sample of chlorine gas that exerts a pressure of 4.5 atm in a 12.6 L containe
    6·1 answer
  • how does the main function of the nervous system help the body react to internal and external stimuli??
    10·1 answer
  • 8.8 Why do esters with higher molecular mass not have strong fragrances?​
    7·1 answer
  • Suppose you wish to jump horizontally and in order for you to jump a distance of 4 feet horizontally, you must exert a force of
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!