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
fiasKO [112]
4 years ago
5

Give the nuclide symbol for an atom that has mass number 64 and 35 neutrons.

Chemistry
1 answer:
azamat4 years ago
5 0
The mass number represents the summation of the number of protons and the number of neutrons in the nucleus of an atom.
We are given that the mass number is 64 and that the number of neutrons is 35. Therefore:
number of protons = 64 - 35 = 29 protons

In ground state, number of protons in an atom is equal to the number of electrons. Therefore,
number of electrons = 29 electron

Using the periodic table, we will find that the element that has 29 electrons in ground state is copper.
The nuclide symbol of copper is shown in the attached image.

You might be interested in
A sample of gas occupies 9.0 mL at a pressure of 500.0 mm Hg. A new volume of the same sample is at a pressure of 750.0 mm Hg.
telo118 [61]
Use the relatio P1V1=P2V2 ( p= pressure, v= volume)- assuming number of moles of gas and temperature are kept constant.

1.) A. Larger- pressure increases from 500mmHg to 750mmHg.

2.) B. Smaller

3.) B. 6.0mL
7 0
3 years ago
When was helium discoved?
andrey2020 [161]
It was discovered in 1868.i hope this helps you .
4 0
3 years ago
1. write the complete chemical symbol for the ion with 14 protons 15 neutrons and 18 electrons
motikmotik

Answer:

1.   Si^{-4}

2.  Co^{+2}

Explanation:

An ion is formed when an atom that is said to be neutral gains or losses electrons.

It is thought that a negative ion (anion) is produced as it gains electrons and a positive ion (cation) is formed when it loses an electron.

Atomic number is the total number of protons and electrons in a neutral atom.

From the information

Protons = 14

electron = 18

Net Charge = no of proton - no of electron

= 14 - 18 = -4

Mass number = 14 + 15 = 29

Thus, the chemical symbol = Si^{-4}

For ion with 27 proton, 32 neutrons and 25 electrons

Net charge = 27 - 25 = +2

Mass number = 27 + 32 = 59

Thus, the chemical symbol = Co^{+2}

6 0
3 years ago
Thủy phân este trong môi trường kiềm, thu được natri axetat và ancol metylic. công thức X là gì?
ValentinkaMS [17]

Correct option is B ethyl ethanoate

The following compound is ester R−COO−R ′ and the naming of ester are done on the basis of alkanoate group (R−COO−) and alkyl (R ′ ) combined to form ester.The suffix for ester is "-oate". The full name of ester is like alkyl alkanoate. Thus the name of given compound is ethyl ethanoate.

<em>-</em><em> </em><em>BRAINLIEST</em><em> answerer</em><em> ❤️</em>

3 0
3 years ago
You and several novice researchers decide to set up some experiments in an attempt to explain why potassium reacts with oxygen t
guajiro [1.7K]

Answer:

Rubidium and cesium

Explanation:

It is noteworthy to say here that larger cations have more stable superoxides. This goes a long way to show that large cations are stabilized by large cations.

Let us consider the main point of the question. We are told in the question that the reason why potassium reacts with oxygen to form a superoxide is because of its low value of first ionization energy.

The implication of this is that, the other two metals that can be examined to prove this point must have lower first ionization energy than potassium. Potassium has a first ionization energy of 419 KJmol-1, rubidium has a first ionization energy of 403 KJ mol-1 and ceasium has a first ionization energy of 376 KJmol-1.

Hence, if we want to validate the hypothesis that potassium's capacity to form a superoxide compound is related to a low value for the first ionization energy, we must also consider the elements rubidium and cesium whose first ionization energies are lower than that of potassium.

8 0
3 years ago
Other questions:
  • Explain how energy is conserved between this reaction and the and surrounding environment C3H8+4O2-&gt;3CO2+4H2O+ heat (-2218.6)
    12·1 answer
  • Though energy can change forms, the total amount of energy in the universe remains constant.
    6·2 answers
  • what volume of a 0.149 m potassium hydroxide solution is required to neutralize 17.0 ml of a 0.112 m hydrobromic acid solution?
    15·1 answer
  • How many moles of HCI are needed to prepare 8.0 liters of a 4.0 M solution of HCI?
    15·1 answer
  • The independent variable is the variable that you measure.<br> True or False?
    13·1 answer
  • When a caterpillar is big enough, it will form a chrysalis. During which stage of metamorphosis does this occur? (2 points) a Ad
    10·2 answers
  • HELP ASAP!!!! write 1-3 sentences explaining the purpose of having different ways to describe different quantities of eggs
    12·1 answer
  • A chemical reaction that gives off heat as it proceeds is said to be:.
    14·1 answer
  • How can the requirements of Na (sodium) solve the requirements of Cl (chloride) instability achievement?
    12·1 answer
  • How many molecules are in 3.5 moles of hydrogen
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!