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
vova2212 [387]
2 years ago
5

What are periods on the periodic table? How many are there?

Chemistry
1 answer:
Brums [2.3K]2 years ago
8 0
A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.
You might be interested in
What are some of the main ways to add energy to a reaction? plzzz help
Tresset [83]

Answer:

Heat.

Light.

Sound.

Electricity

Explanation:

4 0
2 years ago
What poisonous gas is found in the exhaust fumes of car engines?
Ugo [173]
The toxic gar expelled from the reaction between gasoline and oxygen in the vehicle's engine is both Carbon dioxide and monoxide
4 0
3 years ago
Read 2 more answers
Cellular respiration role during water cycle
maks197457 [2]

Answer:

Explanation:

Our breath being absorbed by the atmosphere and dumped back down in the form of rain or snow is one of them. Respiration is the most important metabolic process for animals that can't make their own energy. It allows organisms to gather oxygen from the air in exchange for carbon dioxide and water vapor .

6 0
3 years ago
16. Explain why antifreeze is used in vehicle radiators. Use your knowledge of the properties of
Fynjy0 [20]

Answer:

Antifreeze is whats used to keep your engine cool without freezing.

Explanation:

it keeps the engine from overheating.

It also prevents corrosion.

Here is a quote from google "Antifreeze works because the freezing and boiling points of liquids are “colligative” properties. This means they depend on the concentrations of “solutes,” or dissolved substances, in the solution. A pure solution freezes because the lower temperatures cause the molecules to slow down"

That quote is from "The Science Behind Antifreeze"

If you have any questions feel free to ask in the comments.

4 0
3 years ago
What is the molar mass of C3N4? (Do NOT round this number.)
vichka [17]

Answer:

92.06 g/mol

Explanation:

4 0
2 years ago
Other questions:
  • Each energy level of an atom has a maximum number of ____ it can hold.
    6·1 answer
  • Hydrogen gas (a potential future fuel) can be formed by the reaction of methane with water according to the following equation:
    8·1 answer
  • Why is CaF2 not a molecular formula?
    8·1 answer
  • Recall how Newton's investigation of light followed one form of scientific method​
    13·1 answer
  • What are the two types of numbers in experimental calculations?
    12·1 answer
  • PLEASE HELP!
    12·2 answers
  • In 1676, Robert Plot discovered a large bone in a quarry in Cornwall, England. He observed that the bone looked similar to a hum
    5·1 answer
  • Convert 5 pounds to kilograms <br> Help me pleaseeee
    6·2 answers
  • What can be concluded from the following statements about a property of metats? • Acast-iron skillet on a stove is used to try b
    15·1 answer
  • Polyester and Nylon are examples of synthetic materials called polymers.<br> A. True<br> B. False
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!