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
Nuetrik [128]
4 years ago
14

If calcium has the atomic number 20

Chemistry
1 answer:
dimaraw [331]4 years ago
8 0
If you have a neutral atom (like you normally would) then the number of electrons is equal to the number of protons. If you had more electrons then the charge would be negative. In this case, you would have 20 electrons.
You might be interested in
A sample of ascorbic acid (vitamin C) is synthesized in the laboratory. It contains 30.0 g carbon and 40.0 g oxygen. Another sam
mote1985 [20]

Answer:

16.933g approximately 17.0 grams

Explanation:

From the simple promotions and given the same compound ascorbic acid (vitamin C)

In the laboratory synthesised ascorbic acid

Mass of carbon = 30.0g

Mas of Oxygen = 40.0g

That is the mass of Oxygen per unit mass of Carbon

Per gram of Carbon we have

(30.0g Carbon)÷30 combines with (40.0g of Oxygen)÷30

That is 4/3g of Oxygen per gram of Carbon

Hence the mass of Oxygen compound that combines with 12.7g of Carbonin natural occurring ascorbic acid (vitamin C) is = 4/3×12.7 = 16.933g approximately 17.0g

8 0
3 years ago
Nuclear fusion in the sun involves hydrogen (H) atoms combining to form helium (He). A student claims that since the atmosphere
Lisa [10]

Nuclear fusion in the sun involves hydrogen (H) atoms combining to form helium (He). A student claims that since the atmosphere contains hydrogen, any fusion reaction on Earth would result in an uncontrolled chain reaction. What is wrong in the student’s reasoning is that the uncontrolled chain reactions can only happen during nuclear fission.

5 0
3 years ago
Read 2 more answers
1. In an energy pyramid, which way does energy transfer?
natka813 [3]

It is B, From the bottom of the pyramid to the top

5 0
3 years ago
Which of the following statements are true of acids and bases?
gtnhenbr [62]
A. Acids increase the number of OH- ions in a solution. FALSE
B. Bases increase the number of OH- ions in a solution. TRUE
C. Acids increase the number of H+ ions in a solution. TRUE
D. Bases increase the number of H+ ions in a solution. FALSE
8 0
3 years ago
QUESTION 4<br> Balance this chemical equation. A H2S + B Ag ---&gt; C Ag2S + DH2
photoshop1234 [79]

Answer:

1H2S + 2Ag --> 1Ag2S + 1H2

Explanation:

1H2S + 2Ag --> 1Ag2S + 1H2

You only have to make sure to have the same amount of each element in each side of your chemical equation

7 0
3 years ago
Other questions:
  • Select the correct answer. Which is the most electronegative element? A. nitrogen B. fluorine C. sodium D. cesium E. hydrogen
    9·2 answers
  • How does muscle tissue help the stomach digest food ?
    13·1 answer
  • The element in period 3 with the most metallic character is A sodium
    5·1 answer
  • How to determine the number of valence electrons using the As and Bs system
    12·1 answer
  • Find the volume of a sample of aluminum if its density is 2.699 g/cm3 and its mass is 26.0g?
    7·1 answer
  • Is sulfur hexafluoride a compound?
    10·1 answer
  • What are the products of this chemical equation? HCl(aq) + NaOH(aq) →
    6·2 answers
  • PLEASE HELP MEEEEEEEEEEEEEEEEEEE
    6·2 answers
  • Drag each label to the correct location. Each label can be used more than once.
    15·1 answer
  • What is the approximate power per area emitted by the inside wall of an oven when baking a cake in w/m2?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!