Answer:
Stars create new elements in their cores by squeezing elements together in a process called nuclear fusion. First, stars fuse hydrogen atoms into helium. Helium atoms then fuse to create beryllium, and so on, until fusion in the star's core has created every element up to iron.
Explanation:
Answer:
1.43 g/L
Explanation:
Message me for extra information
parkguy786 snap
Answer:
A Scientific hypothesis must be testable, for a hypothesis to be testable means that it is possible to make observations that agree or disagree with it. This statement may or may not be true, but it is not a scientific hypothesis. That's because it can't be tested.
Explanation:
Answer is (1) - less mass and greater penetrating power.
Alpha particle is a ₂⁴He nucleus while beta particles are electrons. Hence, the mass of alpha particle is greater than the mass of beta particle. But, the penetrating power is higher in beta particle than alpha particle. Alpha particles can be blocked by few papers but beta particles can go through those papers.
Density of copper can be calculated using the following formula:
Here, m is mass and V is volume, thus, to calculate density first calculate mass and volume of copper.
In FCC, number of atoms in a unit cell are 4, atomic mass of Cu is 63.546 g/mol and number of atoms in 1 mole is 
.
Mass of Cu will be:
Now, volume can be calculate as:
Here, a is edge length.
First convert edge length from pm to cm
Thus,
Putting the value,
Now, from mass and volume density can be calculated as follows:
Therefore, density of copper will be 
.
