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
GalinKa [24]
3 years ago
12

The value of A for an atom containing 12 protons, 12 electrons and 16 neutrons is

Chemistry
1 answer:
Zepler [3.9K]3 years ago
3 0

Answer: A = atomic number = 12

Explanation: A (atomic number) defines the chemical element. It is the numbervof protons or electrons. Neutron numbers may vary, produving isotopes of differing atomic mass. This isotope has atomic mass 28. The atomic number 12 = carbon. C28 does not really exist. If it could be produced it would be radioactive with an almost zero halflife.

You might be interested in
What is the wave speed <br>a wave with a wave length of 1000 m and a frequancy of 3000000 Hz ​
Alla [95]

Answer:

v = 3,000,000,000 m/s

Explanation:

v = f *L

v = 3,000,000 * 1000

v = 3,000,000,000 m/s

7 0
3 years ago
Which type of electromagnetic radiation has the longest wavelength?
Montano1993 [528]

Answer:

B. Infrared.

Explanation:

Referring to the electromagnetic spectrum, ultraviolet rays can be measured with a frequency of 10‐⁸, infrared has a frequency of 10‐⁵, visible radiation has a frequency of 0.5 x 10‐⁶ meanwhile X-rays show a frequency of 10‐¹⁰.

Hence, the largest magnitude among the rest goes to infrared rays, which makes B the correct answer.

8 0
4 years ago
The relative atomic mass of an element is
balu736 [363]

Answer:

A

Explanation:

compare it to carbon 12 I believe

3 0
3 years ago
Being able to roll the tongue is dominant over not being able to roll the tongue.
-Dominant- [34]

Answer:

Its 0

Explanation:

7 0
3 years ago
Read 2 more answers
Initially, a 55.0 liter compressible container, holding 2.4 moles of a gas, exerts a pressure of 760 millimeters of mercury at a
Bingel [31]
You would have to use the ideal gas law for this:
PV=nRT
Pressure, Volume, n=moles, R gas constant, Temperature in Kelvin
P=nRT/V
(1.8mol)(62.36)(309K)/43.0L = 805mm Hg 
5 0
3 years ago
Read 2 more answers
Other questions:
  • A sample of gas at 313 K and 4.95 atm occupies 85.62 L of space. Which
    5·1 answer
  • The transfer of energy from place to place or particle by direct contact is what
    8·1 answer
  • A neutralization reaction was performed using NaOH (volume - 250 ml., concentration - 0.500 M) and nitric acid (volume - 25.0 ml
    8·1 answer
  • Write a scientific explanation explaining how the earth recycles plate materials?
    7·1 answer
  • Consider the reaction of KOH with H3PO4 to form K3PO4 and H2O. If 5.38 g H3PO4 is reacted with excess KOH and 7.97 g of K3PO4 is
    5·1 answer
  • A 1.18 L sample of gas at 759 mm Hg pressure is expanded until its volume is 2.06 L. What will be the pressure in the expanded g
    10·2 answers
  • Due is 10 min please help
    11·1 answer
  • Which of the following is NOT a common property of water?
    14·1 answer
  • A patient is given 200 mg of a drug with the formula: C32H34N6O10. How many mg of the drug is carbon?
    10·1 answer
  • Your teacher gives you a sample of an unknown element which is sealed in a glass tube at room temperature. At the bottom of the
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!