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
Alexus [3.1K]
3 years ago
9

Please help guys!!! Points + Brainliest

Mathematics
2 answers:
Bas_tet [7]3 years ago
8 0
Protons and electrons are 12. For neutrons, there are 12 of them. 
<span>Magnesium has an </span>atomic number<span> of 12, which means there are 12 protons.
You subtract the atomic number from the mass number in order to find neutrons.
</span>Atomic mass is 24. 24-12=12
Electrons always match the number of protons.
Ipatiy [6.2K]3 years ago
5 0

Answer:

Part 2:

There are 19 protons in the element K, you can tell because of the number 19 above the elements abbreviation. There are also 19 electrons in this element, you can tell because the number of protons is the same number of electrons. Last, to find the number of neutrons an atom possesses, you have to round the atomic mass ( 39.089 to 39 ). Then you take your Mass number ( 39 ) and subtract it from your number of protons (19). 39 - 19 = 29, there are 29 neutrons in the element K.

Hope that this helps! :)

Also if you need part 1 :)

Part 1:

The two-element that has the same properties as Magnesium are Calcium (Ca) and Strontium (Sr). These three elements are all Alkaline earth metals, they are not as reactive as Alkali metals but they are too reactive to be found in nature.

You might be interested in
SOMEONE HELP :'(((
jeka57 [31]

Answer:

The natural no between 2 to 15 is 2,3,4,5,6,7,8,9,10,11 and 12. prime numbers among these are 2,3,5,7 and 11. therefore,out of 11 number, 5 are prime number.what fraction of the natural numbers between 2 and 15 are prime numbersthe length of abhishek's notebook is 17cm and 8 mm. What will be its length in cm

3 0
2 years ago
All triangle angles have 60 degree angles. What are the side lengths?
Alex_Xolod [135]
If all the angles are 60 degrees, this is an equilateral triangle. This means that all the sides have the same lengths. Whatever length side a is, b and c have the same length. 

Hope this helps :)
3 0
3 years ago
Read 2 more answers
6) The population of rats doubles every 8 months. If there were 23 rats to start how many
taurus [48]

Answer:

736

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Find the area of a circle with a diameter of \color{green}{4}4start color green, 4, end color green. Either enter an exact answe
Oxana [17]

Answer:

the area of the circle is 4π

Step-by-step explanation:

The computation of the area of the circle is shown below:

As we know that

The area of the circle = πr^2

where

diameter = 4

So radius = diameter ÷ 2

= 4 ÷ 2

= 2

Now the area of the circle is

= π × 2^2

= 4π

hence, the area of the circle is 4π

8 0
2 years ago
Which real number is not both a whole number and an integer? A. 18 B. 43 C. 0 D. −229
Verdich [7]
A negative number is not considered a whole number...so ur answer is -229
5 0
3 years ago
Other questions:
  • What is two minus two
    7·2 answers
  • Tonya opens a credit card in which the minimum monthly payment is 10%. Her current balance is $1,950, not including the finance
    7·2 answers
  • (1 point) A chain 64 meters long whose mass is 24 kilograms is hanging over the edge of a tall building and does not touch the g
    8·1 answer
  • The number of calls coming per minute into a hotel reservation center is Poisson random variable with mean 3.
    9·1 answer
  • Please help with numbers 5 and 7!
    11·1 answer
  • A stadium has central rectangular area 125m long by 80 m wide there are two semicircular ends.running tracks goes all way round
    6·1 answer
  • 5 7/8 x (2 4/5 ÷ 7)<br><br> AHH HELP I'M TO STUPID FOR THIS
    8·1 answer
  • what pattern do you notice in the placement of the decimal point when multiplying 0.36 by 10 and by 100​
    15·2 answers
  • a clothing manufacturer makes coats, shirts and slacks. The time required for The Cutting, sewing, and packaging on each item is
    5·2 answers
  • 1 point<br> Juan got 1603 as the sum of 80.1 and 802. Where did he make his<br> mistake? *
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!