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
denis23 [38]
3 years ago
14

What characteristics do atoms of argon-40, potassium-40, and calcium-40 have in common?

Chemistry
1 answer:
timurjin [86]3 years ago
4 0
⁴⁰Ar
N(e)=18
N(p)=18
N(n)=40-18=22

⁴⁰K
N(e)=19
N(p)=19
N9n)=40-19=21

⁴⁰Ca
N(e)=20
N(p)=20
N(n)=40-20=20
You might be interested in
I need to make up an experiment !! Please help
katen-ka-za [31]

Question: Baking a Cake Without Flour.

Hypothesis: I think that when I remove the flour from the standard cake recipe, I'll end up with a flat but tasty cake.

Procedure: I baked two cakes during my experiment. For my control, I baked a cake following a normal recipe. I used the Double Fudge Cake recipe on page 292 of the Betty Crocker Cookbook. For my experimental cake, I followed the same recipe but left out the flour. I first obtained a 2-quart mixing bowl.  

Results: My control cake, which I cooked for 25 minutes, measured 4 cm high.  Eight out of ten tasters that I picked at random from the class found it to be an acceptable dessert. After 25 minutes of baking, my experimental cake was 1.5 cm high and all ten tasters refused to eat it because it was burnt to a crisp.

What did I learn?/Conclusion: Since the experimental cake burned, my results did not support my hypothesis.  I think that the cake burned because it had less mass, but cooked for the same amount of time.  I propose that the baking time be shortened in subsequent trials.

-

I hope this helped :))

7 0
3 years ago
When aluminum is mixed with iron ii oxide iron metal and aluminum oxide?
Alexandra [31]
Are produced along with a large quantitu of heat
6 0
3 years ago
When convex mirrors are used for security purposes, the images they form
konstantin123 [22]

Answer:false

Explanation:

3 0
3 years ago
Why are fixed resistors’ values indicated by color bands rather than printing the numeric value on their exterior?
gladu [14]
Because there are so many different values of numbers, it would be impractical to use 1Ω, 2Ω, 3Ω... etc... Using colored bands helps make reading it a little easier to the trained eye. There are hundreds of thousands, if not tens of millions of different resistors would need to exist to cover every value. So you just use something called "preferred values" with their resistance values posted on them instead.
6 0
3 years ago
What is the relationship between the internal energy of a substance and its particle movement?
ss7ja [257]

Answer: The closeness, arrangement and motion of the particles in a substance change when it changes state. Materials are a store of internal energy , due to the motion of particles and the chemical bonds between them. When a substance is heated, its internal energy increases: the movement of its particles increases.

Explanation:

6 0
3 years ago
Other questions:
  • Which substances will make a salt when combined? Vinegar and antacids Soda and wine Soap and ammonia Fertilizer and detergent
    7·2 answers
  • Chem Data Analysis help plzz<br><br>2.6 x 10⁸ ÷ 9.0 x 10¹⁰​
    5·1 answer
  • Calculate the volume in ml of 0.20m naoh needed to react completely with 100.ml of 0.040m acetic acid.
    5·1 answer
  • Which of these equations best summarizes photosynthesis?
    10·1 answer
  • The continuing portrayal of Italian Americans as gangsters is an example of: A.ethnocentrism
    8·1 answer
  • Which of these statements is correct with respect to pH?
    13·2 answers
  • Which of the following is not a savanna?<br> a. Cerrado<br> b. Pampas<br> C. Llanos<br> d. Serengeti
    11·2 answers
  • The speed of light is 3.0 x 10^8 m.s^-1. what is the speed in nm.ms^-1 ?
    6·1 answer
  • Whats the answer? please help me​
    8·1 answer
  • How many atom in protons
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!