Quarks, the smallest particles in the universe, are far smaller and operate at much higher energy levels than the protons and neutrons in which they are found.

7 0

3 years ago

Isotope A contains 56 protons and 80 neutrons. Isotope B contains 55 protons and 81 neutrons. Isotope C contains 57 protons and

ioda

mass number is defined as sum of number of protons and neutrons

so here for Isotope A

Isotope A contains 56 protons and 80 neutrons.

Mass number will be given as

$A = 56 + 80 = 136$

For Isotope B

Isotope B contains 55 protons and 81 neutrons.

$A = 55 + 81 = 136$

For Isotope C

Isotope C contains 57 protons and 80 neutrons.

$A = 57 + 80 = 137$

For Isotope D

Isotope D contains 56 protons and 74 neutrons.

$A = 56 + 74 = 130$

So here Isotope A and Isotope B has same mass number

3 0

3 years ago

Describe three common issues that affect societies across places and times

Vesna [10]

Poverty, Natural Disaster, and Disease are 3 answers.

6 0

3 years ago

I'll give brainliest if you give me a good awnser. :)

lbvjy [14]

Answer:

0.5

Explanation:

4 0

3 years ago

Read 2 more answers