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
Lostsunrise [7]
3 years ago
6

Which statement concerning elements is true? (1) Different elements must have different numbers of isotopes. (2) Different eleme

nts must have different numbers of neutrons. (3) All atoms of a given element must have the same mass number. (4) All atoms ofa given element must have the same atomic number
Chemistry
1 answer:
Lana71 [14]3 years ago
8 0

Answer:

(4) All atoms of a given element must have the same atomic number

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

However, when we talk about the atomic number of the ion, it is not equal to the number of electrons as electron can be gained or loosed.

This is why, more appropriately, the number of the protons which are present in the nucleus of the atom is called the atomic number.

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

<u>Thus, atomic number of an element is an unique property of the element and it's atom.</u>

You might be interested in
Is Kl covalent or ionic?
kotegsom [21]
I believe that the answer is ionic
3 0
3 years ago
Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: 2Mg + O2 → 2M
tigry1 [53]

Answer:

We will expect 4 moles of MgO to be formed (option b).

Explanation:

Step 1: The balanced equation

2Mg + O2 → 2MgO

Step 2: Data given

Number of moles of Magnesium = 4 moles

Oxygen = in excess  → this means Magnesium is the limiting reactant

Magnesium will completely be consumed ( 4 moles). There will remain 0 moles.

For 2 moles of magnesium consumed, we need 1 mole of oxygen to produce 2 moles of MgO.

For 4 moles of magnesium, we need 4/2 = 2 moles of oxygen.

For 4  moles of magnesium, we will produce 4/1 = 4 moles of MgO

We will expect 4 moles of MgO to be formed (option b).

4 0
3 years ago
What is NOT a property of a metal?
Phantasy [73]

Answer:

Lustrous is NOT a property of metal

6 0
3 years ago
The wastewater in your home goes to one of three places. It can run into a home septic system, it can go to a centralized sewage
NemiM [27]

Answer:

                                                 

Explanation:

5 0
3 years ago
Read 2 more answers
Consider a mixture of soil and water and compare it to a colloid, such as milk. Which property best differentiates these two mix
antoniya [11.8K]
Milk is colloid while soil and water is a heterogeneous mixture and is a suspension mixture.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is an example of a chemical change? alcohol evaporating (b) water boiling
    15·2 answers
  • In an experiment, an unknown gas effuses at one-half the speed of oxygen gas, which has a molar mass of 32 g/mol. which might be
    5·1 answer
  • Mature elephants consume an average of 600 pounds of food per day. If an elephant
    10·1 answer
  • Lice are parasitic insects that live on the scalp, eyebrows, and eyelashes of humans
    11·1 answer
  • Could you do both a and b
    12·1 answer
  • A gas that has a volume of 28 liters, a temperature of 45 0 C, and an unknown pressure has its volume increased to 34 liters and
    7·1 answer
  • Help me, I’m failing chem
    7·2 answers
  • HELP PLEASE I WILL GIVE YOU BRAINLIEST
    9·1 answer
  • PLSS HELPP ME i dont knowww
    6·1 answer
  • What r variable's :) :) :) :) :)
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!