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
Keith_Richards [23]
2 years ago
6

PLS ANSWER ALL QUESTIONS FOR 67 POINTS

Chemistry
1 answer:
Elena L [17]2 years ago
3 0

Explanation:

1. subatomic particles. 

2.proton, electron and neutron

3.The atomic mass of an element is actually the sum of the MASSES of protons and neutrons in AN atom of that element

4.An element's atomic number is equal to the number of protons in the nuclei of any of its atoms

5. Number of Protons = Atomic Number

Number of Electrons = Number of Protons = Atomic Number

Number of Neutrons = Mass Number - Atomic Number

For krypton:

Number of Protons = Atomic Number = 36

Number of Electrons = Number of Protons = Atomic Number = 36

Number of Neutrons = Mass Number - Atomic Number = 84 - 36 = 48

6. electron, lightest stable subatomic particle known. It carries a negative charge of 1.602176634 × 10−19 coulomb, which is considered the basic unit of electric charge. The rest mass of the electron is 9.1093837015 × 10−31 kg

7.The center of the atom is called a nucleus

8. Negatively charged particles are found in multiple layers outside the nucleus of the atom. These particles are called electrons, and they orbit in various energy levels around the atom's nucleus.

9. A charged particle is also called an ion

You might be interested in
What is an element considered a pure substance?
Alona [7]

A compound is a pure substance composed of two or more different atoms chemically bonded to one another. A compound can be destroyed by chemical means. It might be broken down into simpler compounds, into its elements or a combination of the two.


8 0
2 years ago
Are all molecules of a particular substance alike?
STALIN [3.7K]

Answer:

Yes.

Explanation:

Yes, all molecules of a particular substance are similar or alike if the substance has similar shape and structure. Molecule is made up of two or more atoms having no charge on them and the atoms present in it make bonds with each other. For example, water is made of similar molecules i. e. two hydrogen atom and one oxygen atom bonded together with a covalent bond.

4 0
3 years ago
Two students prepare lab reports one for a chemistry class and the other for a biology class which of the following items will b
AleksandrR [38]

Answer:

the results of an investigation thank me later

Explanation:

4 0
3 years ago
Do the gas laws apply to liquids ?
Contact [7]

Answer:

The Ideal Gas Law cannot be applied to liquids. The Ideal Gas Law is #PV = nRT#. That implies that #V# is a variable. But we know that a liquid has a constant volume, so the Ideal <u><em>Gas Law cannot apply to a liquid.</em></u>

Explanation:

this is my awnser soory if it was a multiple choice question plz mark brainliest

6 0
3 years ago
Read 2 more answers
How were the elements in the first periodic table arranged?
Snezhnost [94]

Based on atomic mass

Explanation:

Elements were arranged on the first periodic table based on their atomic masses.

The mass of an atom is made up of the mass of the nucleus which contains the protons and neutrons.

  • Dimitri Mendeleev was the first person credited for arranging elements periodically.
  • He was said to have been inspired while playing his game of solitaire on a train.
  • On his table, he left spaces for the atomic masses of elements not yet discovered.
  • Today, the periodic table is based on the atomic numbers of elements. This is the number of protons in an atom.

Learn more:

Periodic table brainly.com/question/2690837

#learnwithBrainly

5 0
3 years ago
Other questions:
  • How many molecules are in 2.570 moles of H2
    10·2 answers
  • __________ refers to the total energy of a system.
    12·2 answers
  • If the uncompressed gas in the above system has a volume of 300.0 mL at a pressure of 20.0 kPa, what is the volume of the gas wh
    6·1 answer
  • Some elements are solids at room temperature true or false
    12·1 answer
  • What is fusion energy
    8·2 answers
  • Which of the following molecules would have the strongest London Dispersion Force?
    10·1 answer
  • Which hypothesis led to discovery of the proton?
    11·2 answers
  • What is the pH of a solution that has a [OH-] 2.65*10 -9 M
    11·1 answer
  • Given 25.43 g of O2 gas, how many liters of gas will you have at STP?<br><br>Answer value
    7·1 answer
  • Help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!