What’s reaction rate and what factors can affect it? How fast reactants react or how fast products appear in a chemical reaction is called reaction rate. Reaction rate is determined by energy changes …
What’re nuclear reactions and why do they occur?
There are two types of nuclear reactions. The first is radioactive decay and second nuclear transmutation. Nuclear reactions are reactions that involve the nucleus of an atom. To understand these …
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How to calculate the number of electrons in an ion
How to calculate the number of electrons in a positive ion To calculate the number of electrons in an ion that carries a positive charge, you must recall that when an ion carries a positive …
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How do atoms form ions?
How do atoms form ions? An ion is formed when an electron is removed or added to an atom. Pay attention to the word in bold: electron. Recall that an electron has a negative charge, while a …
Why do some reactions release energy, while others absorb energy from the surroundings?
Why do some reactions release energy, while others absorb energy from the surroundings? If reactant molecules in a particular reaction have more energy than the product molecules, then energy is …
If a substance is homogeneous, is it a pure substance?
If a substance is homogeneous, is it a pure substance? Homogeneous means the same or uniform throughout. Therefore, a homogeneous substance can either be a mixture or a pure substance. When a …
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