The second option is the answer. This is a mixture of two common substances that can be separated by chemical means.
NaCL is a compound that was formed through a chemical reaction between sodium and chlorine. In that reaction sodium which is a toxic metal combines with chlorine, a poisonous gas, to form a harmless but totally new compound NaCl or table salt.
Since the sodium ions have a positive charge and the chlorine ions have a negative charge, they are attracted to each other to form an ionic bond.
Sodium can only be separated from Chloride by chemical means e.g. electrolysis.
Answer: Option (d) is the correct answer.
Explanation:
A compound is defined as a substance which contains two different atoms that chemically combine together in a fixed ratio by mass.
A compound can be broken down into its constituent particles.
Pure substances are defined as the species which contains same type of atoms.
For example, NaCl is a pure compound and it can be separated into sodium and chlorine elements.
Thus, we can conclude that the statement a pure substance that can be separated into different elements by chemical means, best describes a compound such as sodium chloride.
c is wrong it’s physical weathering
Water droplets begin to fall back to Earth from clouds.
B
Water vapor transfers back to water droplets or ice crystals.
Small particles form and bump into each other to form clouds.
D
The sun turns water into water vapor as it heats Earth's surface.
Answer:
B. Water vapor transfers back to water droplets or ice crystals.
Explanation:
Its What I know ehe sorry in advance if its wrong :))
B. the size of the particles in a gas
C. the constant motion of the particles in a gas
Answer: Option (A) is the correct answer.
Explanation:
It is known that particles of a gas are held by weak Vander waal forces, therefore, there is no force of attraction between gas molecules.
As a result, these particles are in random motion.
Thus, we can conclude that out of the given options, the constant motion of the particles in a gas allows a gas to fill a container.
Protons and electrons have the same mass.
b
Protons have a positive charge and are found in the nucleus.
c
Neutrons are negative and are found outside the nucleus.
d
Electrons are negative and are found in the nucleus.
The statement which is true about the subatomic particles within an atom is as follows:
Thus, the correct option is B.
Subatomic particles may be defined as those particles that significantly compose an atom. Such particles are generally smaller than atoms. In other words, it can be said that the subatomic particles are united together to form any atom.
Protons are positively charged subatomic particles that are found in the nucleus of an atom. Electrons are negatively charged subatomic particles that are significantly revolving around the nucleus of an atom.
Neutrons do not have any charge, they are neutral and are found in the nucleus of an atom along with protons.
Therefore, the correct option for this question is B.
To learn more about Subatomic particles, refer to the link:
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