EkybooachelbyL EkybooachelbyL

04-03-2017
Biology

contestada

The atomic mass of potassium is 39. if its atomic number is 19, how many neutron are there

Respuesta :

04-03-2017

19. The atomic number indicates how many neutrons there are, and the atomic mass tells us how many protons and neutrons are present within the nucleus of an atom.

Answer Link

Otras preguntas

Gregory Mendel discovered some basic rules about inheritance. DNA. RNA. reproduction.

what are the frequencies of EM spectrum

How many fact families with a dividend under 100 contain only odd numbers? You can use a multiplication table to help you.

multiple choice. Close reading is a strategy that is meant to be practiced __________. A)at the end of a project. B)several times C)one time D)with a partner I

What circumstances prevented England from expanding its territories as quickly as other European nations

completing the square v^2 + 4v - 22= 10

Ruiz needs to buy a countertop for a kitchen. He calculated the area to be 16 square feet. The actual area is 15.4 square feet. What is Ruiz's percentage error?

Explain the differences in the vocabulary words given below. Then explain how the words are related. Use completed sentences in your answer. 1. fossil fuel- pe

Define Popular Sovereignty.

A triangle has an exterior angle with a measure of 120°. Can you determine the measures of the interior angles? Explain.