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
maxonik [38]
3 years ago
8

15 POINTS PLEASE HELP

Chemistry
1 answer:
Lapatulllka [165]3 years ago
4 0

Answer:

Neutrons = ( Atomic mass – Atomic number ) ( A–Z )

Protons and Electrons are equal to the atomic number

For example Neon,

Mass number (A) = 20

Atomic Number (Z) = 10

Number of Protons = 10

Number of Electrons = 10

Number of Neutrons = ( A–Z ) = 10

Electronic distribution :

K= 2

L= 8

You might be interested in
Determine the number of protons, electrons, neutrons, valence electrons and valency in Oxygen atom (O) and Oxide ion (O2-). Comp
wolverine [178]

Answer:

<em />

<em>                    Atom (O)           Ion (O²⁻)</em>

<em>Protons             8                       8</em>

<em>Electrons          8                      10</em>

<em>Neutrons          8                       8   </em>      ← only for the oxygen-16 isotope.

* The number of neutrons depends on the specific isotope. It is equal to the mass number of the isotope less the number of protons.

Explanation:

<em>Oxygen</em> is the element with atomic number 8. That means that the oxygen atoms have 8 protons.

Protons have relative positive charge equal to +1 and electrons have relative negative charge -1: same magnitude opposite sign.

Thus, the neutral oxygen, O, has also 8 electrons and 8 protons.

As per the number neutrons it depends on the specific isotope.

The isotopes are identified by the mass number, which is the number of protons plus neutrons. For instance, oxygen-16 isotope has mass number 16, 8 protons and 8 neutrons, while oxygen-15 isotope has mass number 15, 8 protons and 7 neutrons.

Oxide ion O²⁻ is the oxygen ion with -2 charge, meaning that it has 2 more electrons than protons. Then, it has 8 protons and 10 electrons, again the number of neutrons depend of the specific isotope.

The stability of an atoms or ion refers to its trend to remain in the same state or react to form another species. The ions O²⁻ are less stable than the neutral atoms O, because the negative charge will be attracted to any positive ion so ti will react faster than the neutral oxygen atom (O).

8 0
3 years ago
1) A toy car with a mass of 2.35 kg is pushed with a force of 21.6 N. What is the acceleration of the car?
Nataly_w [17]

Answer:

The acceleration of the car is 9,19 m/s2

Explanation:

We use the formula: F=m x a---> a=F/m

a=21,6N/ 2,35kg       1N is 1kgxm/s2

a=21,6 kg x m/s2 x 2,35 kg

a=9,191489362  m/s2

6 0
3 years ago
Hydrogen has three isotopes 1H, 2H, and 3H. What is the difference between these three isotopes?
Leona [35]
The main difference between the 3 isotopes of hydrogen are the number of neutrons in the nucleus. Hydrogen has no neutrons, Deuterium has one neutron, and tritium has two neutrons. All three have one proton and one electron.
4 0
3 years ago
4.564000 x 10^-4 express how many significant figures
Vaselesa [24]

Answer: 7

Explanation:

Before a number but after a decimal. The zeros at the end would usually mean that it doesn't count but since the numbers are before the zeros and after a decimal it's 7 sig figs

5 0
3 years ago
Need help with this ASAP<br><br> Thanks!
olga_2 [115]

Answer:

Decomposers (either Secondary Consumer or Tertiary Consumer)

Explanation:

Decomposers eat dead materials and break them down into chemical parts. ... They keep the ecosystem free of the bodies of dead animals or carrion. They break down the organic material and recycle it into the ecosystem as nutrients. Vultures, Blowflies, hyenas, crabs, lobsters and eels are examples of scavengers.

6 0
3 years ago
Other questions:
  • What are points a and b? What does this diagram show? Whats point c?
    10·1 answer
  • What is the molar mass of NaCl (table salt)?
    12·1 answer
  • When studying pea plants, Gregor Mendel made many interesting discoveries and came to a few conclusions about what happens as a
    9·1 answer
  • An atom is made of 5 protons, 6 neutrons, and 7 electrons. Another atom is made of 6 protons, 5 neutrons, and 3 electrons. What
    12·1 answer
  • A single atom of calcium could combine with a single atom of fluorine, creating electron energy stability for both atoms. True F
    13·1 answer
  • El champú ¿es de naturaleza básica o acida? ¿Como puedes saberlo?
    11·1 answer
  • A gas with a volume of 250 mL at a temperature of 293K is heated to 324K. What is the new volume of the gas?
    10·1 answer
  • What three types of particles make up an atom? What are their charges?
    5·2 answers
  • 7) Facilitated diffusion is
    13·1 answer
  • I have 250 mL of an acid. If a friend gives me another 75 mL of the same acid, how much will I have?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!