jlaurenpeele jlaurenpeele

23-08-2018
Chemistry

contestada

How many neutrons does element x have it it’s atomic number is 20 and it’s mass is 88?

Respuesta :

scienceboi22 scienceboi22

23-08-2018

88 is the combined mass of the neutrons and protons whereas 20 is just the protons therefore the answer is 88-20=68

Answer Link

Otras preguntas

Which European power was able to purchase a valuable island with “a few toys”

Determine the factors of 15x2 + 3xy + 10x + 2y. (4 points) (3x + 2)(5x + y) (5x + y)(2x + 3) (3x + y)(5x + 2) (5x + 3)(2x + y)

If tan theta = -4/3 in quadrant II, what is cos theta? A. -4/5 B. 3/5 C. 4/5 D. -3/5

Planes Q and R are parallel. Explain how you know lines a and b are skew.Sample Response: Skew lines are noncoplanar and do not intersect. Line a lies in plane

In the triangle below, what ratio is sin θ?

To warmup before a run, Lucas walks for five minutes. Which of these accurately evaluates his choice of warmup activity? A) this activity is appropriate because

Which should equal 105 to prove that f // g ? A B C D Please hurry !!

Will give brainliest! What is the x-coordinate at the point of intersection of y1= 2(5x + 3) and y2= x2 − 15? Consider only the positive value of x, and round t

HELP PLEASE Evaluate the expression. r = <7, -3, -7>, v = <4, 6, -5>, w = <-5, -6, -3> v ⋅ w a) -41 b) <-20, -36, 15> c) <-28, 18, -

_______ was the policy of the separation of blacks from whites, which was the law of the republic of south africa.