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
choli [55]
2 years ago
15

What is the total number of neutrons in the nucleus of a neutral atom that has 19 electrons and a mass number of 39

Chemistry
1 answer:
zvonat [6]2 years ago
7 0

Answer:

NO OF NEUTRON =MASS NO -ATOMIC NO

=39-19

=20

bcz atomic no is equal to no of electrons

mark as brainliest

You might be interested in
What is the correct name for Mn(NO3),
kupik [55]

Answer:

Manganese trinitrate or manganese(III) nitrate

Explanation:

6 0
3 years ago
the most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to
lara [203]
<span>0.650 kg... I think, 
But what are the answer choices?</span>
3 0
3 years ago
41 to
tia_tia [17]

Answer:

d = 0.9 g/L

Explanation:

Given data:

Number of moles = 1 mol

Volume = 24.2 L

Temperature = 298 K

Pressure = 101.3 Kpa (101.3/101 = 1 atm)

Density of sample = ?

Solution:

PV = nRT     (1)

n = number of moles

number of moles = mass/molar mass

n = m/M

Now we will put the n= m/M in equation 1.

PV = m/M RT   (2)

d = m/v

PM = m/v RT ( by rearranging the equation 2)

PM = dRT

d = PM/RT

The molar mass of neon is = 20.1798 g/mol

d = 1 atm × 20.1798 g/mol / 0.0821 atm. L/mol.K × 273K

d = 20.1798 g/22.413 L

d = 0.9 g/L

4 0
3 years ago
The average atomic mass recorded on the periodic table for cobalt is 58.933 u. This indicates that the most abundant isotope of
OleMash [197]
The average atomic mass of the element is the sum of the products of the percentage abundance of isotope and its mass number. Therefore, for atomic mass equal to 58.933, the most abundant isotope is cobalt-59. Thus, the answer is letter C. 
7 0
3 years ago
The atomic number of polassium and
never [62]

Explanation:

Atomic radius decreases from left to right in a period.

Therefore Calcium would have a smaller atomic size.

6 0
2 years ago
Other questions:
  • Help me please thanks
    6·1 answer
  • M&amp;M balance equations
    13·1 answer
  • NEED HELP ASAP
    11·2 answers
  • Part B Identify the sets of quantum numbers that describe all the electrons in the ground state of a neutral beryllium atom, Be.
    6·1 answer
  • He electrostatic attraction between positively charged nuclei and negatively charged electrons permits two atoms to be held toge
    9·1 answer
  • Which two types of cells are involved in fertilization?
    10·1 answer
  • Someone please just help me just please I’m begging pleaseeeeee
    10·1 answer
  • How to find resistance of a color code with 4 rings?
    11·1 answer
  • How many atoms are in 365 grams of CaCl2
    5·1 answer
  • Which part of John Dalton’s theory was disproved by J.J. Thomson’s cathode-ray tube experiments?(1 point)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!