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
iVinArrow [24]
3 years ago
7

An isotope of cesium has 55 protons and 78 neutrons. What is the mass number of this isotope?

Chemistry
1 answer:
mixer [17]3 years ago
4 0

The only stable caesium isotope is 133Cs, with 78 neutrons.

Hope this answers your Q

You might be interested in
Perform the following metric conversions: Please explain bc I really dont get it at ALL !!!!
makkiz [27]

Answer:

0.2007 nm

3.57 cm

0.01478 g

8280000 pg

Explanation:

1)200.7 pm

1 picometer is equal to 0.001 nanometer.

1 nm = 1000 pm

200.7 pm× 1 nm / 1000 pm  = 0.2007 nm

2)0.000357 hm

1 hectometer is equal to 10,000 centimeter.

1 hc = 10,000 cm

0.000357 hc× 10,000 cm / 1 hc = 3.57 cm

3) 14.78 mg

1 gram is equal to 1000 milligram.

1 g = 1000 mg

14.78 mg × 1 g/1000 mg = 0.01478 g

4)8.280 µg

1 microgram is equal to 10⁶ picogram.

1 µg = 1000000 pg

8.280 µg× 10⁶ pg/ 1µg = 8.280×10⁶ pg or 8280000 pg

7 0
3 years ago
Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act
Usimov [2.4K]

Answer:Acids. :H2CO3, H3PO4,H3OBR

CH3COOH,

Bases MgO,NH4OH,CaOH

Neutral species; CaC,CaCO3,ClO3

Explanation:

5 0
3 years ago
Calcium has an atomic number of 20. How many electrons does calcium lose when forming an ionic bond with another ion?
oksano4ka [1.4K]
2 electrons. it has electron configuration of 2.8.8.2 hence the last 2 will be lost for it to gain stable.
if you need more explanation on periodic table you can reach me at [email protected]
5 0
3 years ago
The Big Bang theory states that ________.
cluponka [151]

I believe the correct answer is B

8 0
4 years ago
Which half reaction correctly describes the reduction that is taking place
pickupchik [31]
<h2>Answer:</h2>

The correct answer is the option A which is: Cl2 + 2e- → 2Cl-

<h3>Explanation:</h3>

<em><u>Reduction is the gain of electrons and resulting in neutral or negative ions.</u></em>

<em><u>It is also the gain of hydrogen and release of oxygen ions.</u></em>

  • According to first most definition, option A describes the reduction.
  • Option B is incomplete reaction.
  • While C and D are oxidation reactions.
6 0
4 years ago
Other questions:
  • Use standard enthalpies of formation to calculate ΔH∘rxn for the following reaction______.2H2S(g)+3O2(g)→2H2O(l)+2SO2(g) ΔH∘rxn
    15·1 answer
  • Why is velocity mean always greater than the most probable velocity?
    12·1 answer
  • Upon combustion, a 0.8009 g sample of a compound containing only carbon, hydrogen, and oxygen produces 1.6004 g CO2 and 0.6551 g
    7·1 answer
  • Properties of substances can be classified as physical or chemical properties. Which statements describe chemical properties? (C
    8·1 answer
  • Which of the following is best revealed by the Bohr Model? . A. Electrons are found only within the nucleus of an atom.
    10·1 answer
  • Which of the following statements about atomic mass is true? (help asap)
    9·1 answer
  • What are two energy alternatives to fossil fuels?
    12·2 answers
  • How many atoms are in 2.75 moles of Mercury (Hg)?
    13·1 answer
  • Which statement is correct for the element of proton number 19?
    12·1 answer
  • Phase change involves changing states of matter (solid-liquid-gas). How do these three states of matter differ from each other?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!