sierrareid94 sierrareid94

22-10-2020
Physics

contestada

What is the mass number of an atom which contains 27 protons, 2 electrons, and 30 neutrons?

Respuesta :

akmalghufran316 akmalghufran316

23-10-2020

Answer:57

Explanation:

Because the mass number of an element is the sum of number of protons and neutrons so add up no of protons and no of neutrons.

Answer Link

Otras preguntas

whats is an equivalent expression to the picture below.

what kind of person do u imagine Bruno's father to be in the boy in the stripped pajamas?

when does Katniss ask herself a tough question

How can pioneer species decrease

The rug is 1 1/2 meters wide and 3 1/6 meters long. What is it's area?

log7 1/49=-x-2 hate math so bad it won't even let me sleep

A steel block has a volume of 0.08 m³ and a density of 7,840 kg/m³. What is the force of gravity acting on the block (the weight) in water?

When 0.2mol of calcium reacts with 880g of water 2.24L of hydrogen gas form at STP How would the amount of hydrogen produced change if the volume of water was d

What was Memorial Day's called previously?

For the missing term in the geometric sequence, Find the possiblefor the missing term in the geometric sequence, Find the possible values.4, ?, 1/36