dv88212 dv88212

22-10-2021
Chemistry

contestada

how many atoms does calcium have?

Respuesta :

kaidonallen81 kaidonallen81

04-11-2021

Answer: 20

Explanation: For example, all calcium atoms have an atomic number of 20 but there are three isotopes of calcium - 39, 40, and 42.

Answer Link

Otras preguntas

4(-2x-5)+8=8x+4 what is the value of x

A food company reduced the amount of salt in one of their food products from 700 milligrams to 630 milligrams. What is the percent decrease in the amount of sal

What’s another name for pure substance

Using a microscope, a student observes a small, green organelle in a plant cell. Which process most likely occurs in this organelle? 1Points A cellular respira

Choose the correct expression to complete the sentence below. Is this outline (all right, alright) with the group? a. all right b. alright Please selec

Since sugar had to pass through many hands before it reached the fairs, it was expensive and hard to get. King Henry III of England, for example, liked sugar.

Find the constant of variation k for the direct variation. x f ( x ) 0 0 2 –1 4 –2 7 –3.5 k = 0.5 k = –2 k = –0.5 k = 0

c(1)=−20 c(n)=c(n−1)+10 Find the 2nd term in the sequence.

By studying fossils, PALEONTOLOGISTS learn about animals and plants of the past. Definition Contrast Synonym Cause/Effect Example

What was the major shortcoming of rutherford’s model of the atom?