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
const2013 [10]
2 years ago
8

(NEED HELP ASAP)

Chemistry
1 answer:
zheka24 [161]2 years ago
8 0
1&3 are the answers lmk if it’s wrong
You might be interested in
Temperature has no effect on matter.<br><br> A <br> True<br><br> B <br> False
andrey2020 [161]

true because matter is a space not a space

5 0
3 years ago
Write the two half-equations for the following redox reaction <br> 2H+ +2Br- +H2SO4= Br2 + SO2 +2H2O
Oduvanchick [21]

Explanation:

bbdjsjakkakajdjehejkskssjsjjanzbh

please report me :/

7 0
3 years ago
The number of positive changes in the nucleus of an atom is equal to
raketka [301]

Answer:

The number of positive charges in nucleus of an atoms are equal to the atomic number and also positive charges are equal to the negative charges which are electrons in neutral atom.

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

Electron:

The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.

Symbol= e⁻

Mass= 9.10938356×10⁻³¹ Kg

It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.

Neutron and proton:

Neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.

Symbol of proton= P⁺

Symbol of neutron= n⁰

Mass of proton=1.672623×10⁻²⁷ Kg

Mass of neutron=1.674929×10⁻²⁷ Kg

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

For example

The carbon have six protons and six neutrons so its atomic mass is 12 amu and atomic number is six.

8 0
3 years ago
Classify the following statements regarding the law of mass conservation as true or false.
Ahat [919]
True true false true
8 0
3 years ago
The emission spectrum of hydrogen shows discrete, bright, colored lines. Which characteristic of the Bohr model is best supporte
natali 33 [55]
The characteristic of the Bohr model that would best support his observation is this assumption: "The energy of the electron in an orbit is proportional to its distance from the nucleus. The further the electron is from the nucleus, the more energy it has." The discrete, bright, colored lines might represent the electrons and its distance from the nucleus. The lights are caused by the energy it has.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Water (2190 g ) is heated until it just begins to boil. If the water absorbs 5.83×105 J of heat in the process, what was the ini
    8·1 answer
  • SpongeBob's mother is so proud of her son and his new wife, SpongeSusie, as they are excepting a little sponge. She knows that t
    8·1 answer
  • Help please help help
    14·1 answer
  • Which amount of a compound dissolved in 100g of water at the stated temperature represents a solution that is saturated
    12·1 answer
  • What gets oxidized in a galvanic cell made with magnesium and zinc electrodes?
    5·2 answers
  • Will marks brainly if it isn’t a copied answer!!!
    8·2 answers
  • Motion is a change in an object​
    11·2 answers
  • A gas has a volume of 13.4 L at 17C. What is the volume of the gas at standard temperature?
    15·1 answer
  • Who was the scientist responsible for the discovery of the keystone species
    6·1 answer
  • Under which of the folowing conditions of temperature and pressure wil H2 gas be expected to behave most like an ideal gas ?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!