griseldadelgado351 griseldadelgado351

02-10-2020
Chemistry

contestada

how many neutrons does a calcium atom have if the mass number is 42

Respuesta :

jsoso102000 jsoso102000

02-10-2020

Answer:

22

Explanation:

calcium has 20 proteins

and given the mass number is 42.

mass number = protons + neutrons

42= 20+ n

n= 42-20

n= 22

Answer Link

Otras preguntas

what is optimisation in analytical instruments

Amoebas are unicellular. The single cell splits in half to form two new cells. A student claims amoebas are alive. Is the student correct? (1 point) O The stude

Cause Effect Europeans arrive in North America in the 1600s. ? O A. Millions of Europeans die from American Indian diseases. O B. European leaders convert to Am

[tex]x+10=12[/tex] -----------------------

i need help with numer 8&9

According to periodic trends, which element would have more valence electrons than oxygen? Select one: phosphorus (P) selenium (Se) chlorine (Cl) carbon (C)

Which statement about the legal risks of misusing prescription drugs is TRUE? a. Using prescription drugs exactly as prescribed can result in legal sanctions b

THE FIRST ANSWER GETS BRAINLIEST AND 50 POINTS 9(x-5)+8(x+5)

Find each product or quotient. Show your work. 1/6×3/4

Which phrase best completes the diagram?