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saw5 [17]
3 years ago
7

A scientist notices that a lump of niobium is warm to the touch and wonders if nuclear reactions are taking place in the metal.

How can she find out?
Measure the metal’s temperature.
Check for the presence of alpha, beta, and gamma particles.
Look for the presence of niobium compounds.
Place the niobium in a pressurized container, and see if the lump becomes warmer.
Chemistry
2 answers:
sertanlavr [38]3 years ago
5 0

Answer is: Check for the presence of alpha, beta, and gamma particles.

1) Alpha particle is nucleus of a helium-4 atom, which is made of two protons and two neutrons.

Alpha decay is radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and transforms into an atom with an atomic number that is reduced by two and mass number that is reduced by four.

2) Beta decay is radioactive decay in which a beta ray and a neutrino are emitted from an atomic nucleus.

There are two types of beta decay: beta minus and beta plus.

3) During gamma emission the nucleus emits radiation without changing its composition.

Mnenie [13.5K]3 years ago
4 0

Answer:

The answer is B.

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What determines the transition between different states of matter?
Scrat [10]

Answer:

Phase transition is when a substance changes from a solid, liquid, or gas state to a different state. Every element and substance can transition from one phase to another at a specific combination of temperature and pressure.

Explanation:

4 0
2 years ago
Chlorine and bromine are elements in Group VII.
Goryan [66]

Explanation:

Bromine is a chemical element with the symbol Br and atomic number 35. It is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured vapour. Its properties are intermediate between those of chlorine and iodine. Isolated independently by two chemists, Carl Jacob Löwig (in 1825) and Antoine Jérôme Balard (in 1826), its name was derived from the Ancient Greek βρῶμος ("stench"), referring to its sharp and disagreeable smell.

Bromine, 35Br

7 0
2 years ago
CORRECT ANSWER GETS BRAINLIST
pashok25 [27]

Answer:

B. halocline

Explanation:

it is a zone in the oceanic water that changes depending on the depth

Hope This Helped Sorry If Wrong

6 0
1 year ago
An aqueous solution contains 32.7% KCl (wt/wt%). what is the mole fraction of KCl in the solution
inna [77]

The mole fraction of KCl in the solution is 0.1051

calculation

mole fraction of KCl in solution = moles of KCl / total number of moles(moles of KCl +moles of H2O)

moles=mass/molar mass

mass of KCl=32.7g

molar mass of KCl= 39 +35.5

moles of KCl is therefore= 32.7g/74.5 g/mol=0.439 moles

find the moles of H2O= mass of H2O/molar mass

mass of H2O=100-32.7=67.3g

molar mass of H2O=( 1 x2) +16=18 g/mol

moles = 67.3/18 =3.739 moles

total moles=3.739+0.439=4.178 moles

mole fraction is therefore=0.439/4.178=0.1051

5 0
3 years ago
What is an ionic compound
Gwar [14]
Ionic compound is formed by negative and positive ions, these ions form ionic bond
6 0
3 years ago
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