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
AleksAgata [21]
3 years ago
10

Hello, Who ever answers gets brainliest!

Chemistry
1 answer:
boyakko [2]3 years ago
5 0

Answer:

First one is a compound.  Second one is single atom and single element. third one is a molecule.

Explanation:

You might be interested in
What is the difference between first ionization energy and second ionization energy?
Veseljchak [2.6K]
Energy requires for removing one electron from the atom is first ionization energy & when another electron is removing than that energy is called 2nd ionization energy.
5 0
4 years ago
the elements fluorine,chlorine,bromine,and iodine are all found in the same group on the table. these elements are grouped toget
madreJ [45]

Answer:

Fluorine, chlorine, bromine and iodine are grouped together because they have the same number of valence electrons.

Explanation:

Fluorine, chlorine, bromine and iodine are all found in group 7, which is the second-last column from the right. Group 7 elements are also called the "Halogens" family.

The group number also tells you the number of valence electrons that the elements have in that group. Valence electrons mean the outermost electrons (See picture).

For example, fluorine has two shells (the circles with dots on them). The outermost electrons, or valence electrons, are the dots on the biggest circle. There are 7 dots, so there are 7 valence electrons, which corresponds with Group "7".

A full shell (except the for first shell) is when there are 8 dots. Since 7 is so close to 8, Halogens are very reactive.

Fluorine, chlorine, bromine and iodine all have 7 valence electrons and are in the Halogens family, which are very reactive.

8 0
3 years ago
Read 2 more answers
Bacteria and viruses are inactivated by temperatures above 139 ∘C in an autoclave. An autoclave contains steam at 1.00 atm and 1
andrezito [222]
To answer this question, we will use pressure law which states that:
"At constant volume of a fixed mass of gas, the pressure of the gas is directly proportional to the temperature"

This means that:
Pi / Ti = Pf / Tf where:
Pi is the initial pressure = 1 atm
Ti is the initial temperature = 100 + 273 = 373 degree kelvin
Pf is the final pressure that we want to calculate
Tf is the final temperature = 139 + 273 = 412 degree kelvin

Substitute in the equation with the givens to calculate the pressure as follows:
1 / 373 = Pf / 412
Pf = (1/373) * 412 = 1.104557641 atm
5 0
3 years ago
Definition of brittleness
Roman55 [17]
Something that breaks with little force against it.
4 0
4 years ago
Read 2 more answers
What is the movement of electricity called
mars1129 [50]
The movement of electricity is called a Current 

hope that helps 
3 0
3 years ago
Other questions:
  • Which of these is a unique property of acids?
    5·1 answer
  • Can water lakes and rivers evaporate
    9·1 answer
  • Which best describes accuracy?
    15·2 answers
  • What consumer is the most important in a food web and pyramid? ( Question asks: Identify the important producers and consumers u
    6·1 answer
  • What answers below correctly identifies the type of change and explanation for the mixture of calcium carbonate and hydrochlorid
    9·2 answers
  • What's the meaning of pH in acids and base​
    9·1 answer
  • How many copper(I) ions (atoms of Cu​ 1+ ) are in a sample of copper(I) sulfate that weighs 35.4 grams?
    14·1 answer
  • How can I change an experiment to a field work
    8·2 answers
  • Why do we need to calibrate equipment​
    5·1 answer
  • Which of the intermolecular forces below occurs between polar molecules?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!