3 years ago

An atom Q contains 19 electrons, 19 protons and 20 neutrons. What is Q

Chemistry

2 answers:

Mariana [72]3 years ago

8 0

Answer:

Potassium is the answer

ZanzabumX [31]3 years ago

3 0

Answer: Potassium

Explanation: Potassium is the chemical element with 19 electrons, 19 protons and 20 neutrons.

Please mark me Brainliest if you think that had answer this question in a better way.

Thank you,

You might be interested in

Jan drew a diagram to compare centipedes and millipedes.

andre [41]

Answer:

BBB millipedes have two sets of legs on each segment.

Explanation:

4 0

2 years ago

Read 2 more answers

Classify the following mixturesin their proper column

PolarNik [594]

Answer:

homogeneous mixtures: iron,alcohol,zonrox,wine.

heterogeneous mixtures: smoke,batchoy,spaghetti,halo halo,book,clothes.

8 0

3 years ago

calculate the enthalpy change for converting 1.00 mol of liquid water at 100 C to water vapor at 145 degree celsius for water Δ

Svetllana [295]

Answer:

q1 = mCpΔT

= 18.016g × 1.84J/g.K × (418.15-373.15)

= 1491.72 J

q2 = n×ΔH vap

= 1mol ×44.0kJ/mol

= 44KJ

∴ qtotal = q1+ q2

= 1.498kJ + 44.0kJ

= 45.498KJ

Explanation: The heat flow can be separated into steps.all that is being observed at a constant pressure,the heat flow is equal to the enthalpy.

8 0

3 years ago

It’s about the periodic table of elements

Pie

Yes what the other person said can I plz get an thanks

3 0

2 years ago

Magnesium has three naturally occurring isotopes with masses of 23.99 amu, 24.99 amu, and 25.98 amu and natural abundances of 78

mihalych1998 [28]

Answer:24.31

Explanation:Contribution made by isotope of mass 23.99= 23.99×78.99=1894.97

Contribution made by isotope of mass 24.99=24.99×10.00=249.9

Contribution made by isotope of mass 25.98=25.98×11.01=286.04

Total contribution=1894.97+249.9+286.04=2430.91

Average mass=2430.91÷100

=24.31

3 0

3 years ago