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Masja [62]
3 years ago
5

How do scientists determine the number of neutrons in an isotope of an atom?

Physics
1 answer:
xz_007 [3.2K]3 years ago
5 0
D subtract the atomic number from the atomic mass

N = A - Z
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SOMEBODY PLEASE HELP!! 20 PTS!!!
aliya0001 [1]

Answer:

1. Reflection

2. travel from one medium to another

3. Same waves to travel in opposite direction.  

Explanation:

1. When a wave strikes a solid barrier, it bounces back in the same medium. This wave behavior of bouncing back is known as reflection. Its like a basketball hitting a backboard. The ball bounces back at the same angle as it was incident. ∠i = ∠r

2. For refraction to occur in a wave, the wave must travel from one medium to another. When light travels from through mediums of different optical densities, it bends. The wave bends away normal when it enters from denser medium to rarer medium. The wave bends towards the normal when it enters from rarer to denser medium. The angle of refraction and angle of incidence are related by Snell's law.

\frac{sin(i)}{sin(r)} = \frac{\mu_2}{\mu_1}

3. The formation of standing wave requires two same waves to travel in the opposite direction and interfere. The incident wave and reflected wave when interfere, form standing waves. There waves are also resonances or harmonics. A standing wave oscillates at one place and does not transfers any energy.

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3 years ago
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One or more calcium ions (Ca+2) combine with one or more chlorine ions (Cl-1). What is the resulting formula?
N76 [4]
The formula is CaCl2 as you need two Cl ions in order to combine with one Ca ion in order to form a neutral compound i.e. You need to have the same amount of charges therefore  you have two Cl ions which have  -1 charges for one +2 Ca ion.
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Does anyone know the answers to these ?
geniusboy [140]

Answer:

thirty degrease west to north

Explanation:

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How is lightning formed with explanation l?
creativ13 [48]
Lightning is an electric current. Within a thundercloud way up in the sky, many small bits of ice (frozen raindrops) bump into each other as they move around in the air. All of those collisions create an electric charge. After a while, the whole cloud fills up with electrical charger
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A ___ is the unit of measurement for force.
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Newton (N)

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A newton is the unit of measurement for force

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