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
N76 [4]
3 years ago
12

Please help me thanks so much....I’ll mark you?!?!:)))) ( 15 points)

Chemistry
1 answer:
lorasvet [3.4K]3 years ago
5 0

Answer:

the first one

Explanation:

You might be interested in
Carbon has four valence electrons. true false
8090 [49]
The answer is true. One neutral atom of carbon has four valence electrons.
 
An easy way of finding out is to check out the periodic table and look at which main number group the element is in. Carbon is in group number four, which would mean it has four valence electrons.

Hope I was able to help!
3 0
3 years ago
A fluorine atom has 9 positive charge,9 negative charges and a mass of 19. Describe the structure of its atom.
Tanya [424]
The atomic structure of the atom contains 9 positively charged particles (protons) and 10 neutrally charged particles (neutrons) in the center of the atom in a clump called the nucleus. Those 9 negatively charged particles (electrons) are moving around outside of the nucleus.
There are 10 neutral charges, because the mass of 19 comes from the number of neutral charges plus the number of positive charges.
To calculate the number of neutral charges, subtract the positive charges from the mass (19 - 9), and you get the number of neutral charges (10).


6 0
3 years ago
When calcium forms an ion that has the same number of outer electrons as which noble gas?
Talja [164]
The answer is 4 krypton
6 0
3 years ago
hich of the following is TRUE? Group of answer choices A neutral solution does not contain any H3O+ or OH- A neutral solution co
Studentka2010 [4]

Answer:

a basic solution has [OH-] > [H3O+]

8 0
4 years ago
Can DNA evidence exclusively conclude ancestry?
In-s [12.5K]

Answer:yes

Explanation:

4 0
4 years ago
Read 2 more answers
Other questions:
  • Brainliest will be awarded..!!
    11·1 answer
  • If 1.2 kilograms of rust forms on a bridge in 5 days, what should be the rate of reaction in grams per hour?
    12·1 answer
  • What did Lorenzo Romano Amedeo Carlo Avogadro theorize in 1811?
    5·2 answers
  • What occurs when kcl(s is added to water?
    9·1 answer
  • The mass number of Fez is 56. How many neutrons are there in a single Fez atom?
    6·1 answer
  • Give the percent yield when 162.8 g of CO2 are formed from the reaction of excess amount of
    5·2 answers
  • HURRRYYYY!!!!<br> Which of the following will lead to a thunderstorm?
    13·1 answer
  • Why is the absolute dating of rocks important?
    14·1 answer
  • A what is matter that is always composed of the same combination of atoms
    15·1 answer
  • Convert 355 km/s into m/ns.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!