All categories

3 years ago

What is the mass number of the isotope lithium-7??

Physics

2 answers:

svp [43]3 years ago

8 0

Explanation:

Mass number is the sum of total number of protons and total number of neutrons present in an atom.

For example, a neutral atom of lithium has mass number 7 and atomic number 3.

Atomic number means the total number of protons present in an atom.

So, isotope of lithium-7 will have 3 protons and 4 neutrons. Thus, mass number of lithium-7 will be 3 + 4 = 7.

FromTheMoon [43]3 years ago

5 0

Lithium-7 is by far the most-common isotope, making up about 92.5 percent of all natural lithium. A lithium-7 atom contains three protons, four neutrons, and three electrons.

You might be interested in

When you close a switch in an electric circuit you are stopping the flow of electrons

jekas [21]

True because all switches use contacts to start or stop the flow of electrons in a circuit

3 0

3 years ago

Read 2 more answers

Name the fundamental units involved in pascal

gtnhenbr [62]

Explanation:

Hey there!

Here,

Pascal is a unit of pressure.

$pressure = \frac{f}{a}$

Now, As per the formula the units are:

kg, m and s^2.

Hope it helps...

5 0

4 years ago

A student is observing a pendulum swinging back and forth. Each time it swings, the pendulum bob reaches a lower maximum, and ev

vodomira [7]

Answer:

the pendulum loses momentum and stops because of gravity and wind resistance. it does not violate the law of conservation of energy because it is not gaining any more momentum than what it had started with

Explanation:

7 0

2 years ago

Read 2 more answers

Why is the solar system commonly represented as a scale model?

topjm [15]

The actual size of the Solar system is too big to show without making a much smaller model. If someone wants to see the orientation of the planets a model has to be made so we can see it without flying out too space.

6 0

3 years ago

Help me guys plzzzzzzzzz

elena-s [515]

Tsunami? I think so maybe it’s right

5 0

3 years ago