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
Sliva [168]
3 years ago
9

Pleae help for a brainlist urgent time is running out !!!!!!!!!

Chemistry
1 answer:
Effectus [21]3 years ago
5 0

Answer:

a) 3

b) 5

c) 4

d) it can be 1/2/3

e) it can be 2/3

f) it can be 2/3/4

g) it can be 4/5

h) 4

Explanation:

You might be interested in
If I have 13 protons and 12 electrons what is my charge?
Mnenie [13.5K]

Answer:

The charge would be +1

Explanation:

Protons have a positive charge while electrons have a negative charge. Therefore, it's simple subtraction. In every case, subtract the number of electrons from the number of protons.

13 - 12 = 1

Therefore the charge is +1

Here's one more example:

If the element chromium (Cr) has 24 protons and 28 electrons, what is its charge? Remember that protons have a positive charge and electrons have a negative charge.

24 - 28 = -4

Charge = -4

It would be written as followed when associating charge with a specific element: Cr^{-4}

If an element has a neutral charge, that means the number of protons and neutrons are the same. If you look at the periodic table of elements, all of the elements listed have a neutral charge. The 0 isn't showed in the corner because it isn't necessary.

Bonus Information:

This isn't related to your question, but I've come across confusions when it comes to particles. Remember that protons (+) and electrons (-) are the only particles that have a charge, therefore, as it says in it's name, neutrons are neutral or have no charge. Neutrons do not contribute to charge, but they do contribute to the <em>mass</em> of an atom. So the number of protons added to the number of neutrons equate to the mass of an atom. Electrons have mass, but it's so miniscule and insignificant that it doesn't even contribute to the overall mass of the atom, so don't count those.

Remember:

C = p - e

M = p + n

C = atomic charge, M = atomic mass, p =protons, n = neutrons, e = electrons

I hope this helps!

7 0
3 years ago
HOW DOES CHEMILUMINESCENCE WORK AND WHERE IS IT USED?
cricket20 [7]
안녕 안녕안
안녕안녕
hope it helped
6 0
4 years ago
The basic elements found in protein molecules
barxatty [35]

Nucleic acids typically contain phosphorous as well as nitrogen. The proteins, being made up a diverse set of amino acids, have, in addition to carbon, hydrogen, oxygen, and nitrogen, the elements sulfur and selenium.

3 0
3 years ago
5. Complete and balance an equation for each reaction:
Kipish [7]

CaI₂ + Hg(NO₃)₂ --------->HgI₂ + Ca(NO3)2

2Al + 3Cl₂ --------->2AlCl3

Ag + HCl ------->AgCl + H2

C2H2 + 5O2 --------> 4CO2 + 2H2O

MgCl₂ --------->Mg + Cl2

6 0
3 years ago
Given the statements below, choose the one that is true about one-celled living things.
grandymaker [24]

Answer: The adult stage for one-celled organisms is usually extremely long.

Explanation:

The first one is false, I'm no expert, but I'm pretty sure that there is some yeast that don't produce spores, even in normal conditions.

The third is false, Algae can be unicellular <em>and </em>multicellular.

The fourth is false, All the Algae in the world is close to <em>half</em>  of the ogygen in the world.

So that leaves the second, The adult stage is usually long for one-celled organisms.

4 0
3 years ago
Other questions:
  • What is the osmolarity of a 0.20 M solution of KCI?
    6·1 answer
  • During which step in "Steps to Solve a Problem” should students pick a strategy to use? Step 1 Step 2 Step 3 Step 4
    10·2 answers
  • How many formula units make up 19.0 g of magnesium chloride?
    12·1 answer
  • HELP
    10·2 answers
  • What is not within the scope of chemistry
    13·1 answer
  • 7. A pastry chef bakes a cheesecake. What is this an example of?* O Physical Change O Physical Property Chemical Change Chemical
    8·1 answer
  • If 1.00 mol of argon is placed in a 0.500-L container at 19.0 ∘C , what is the difference between the ideal pressure (as predict
    8·1 answer
  • An unknown element X has the following isotopes: ²⁵X (80.5% abundant) and ²⁷X (19.5% abundant). What is the average atomic mass
    9·1 answer
  • If ionization energy of hydrogen atom is 13.6 eV then its ionization potential will be
    6·1 answer
  • How many J of energy would you need in order to heat 252 grams of
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!