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revesed
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∙ 14y ago
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What is a substance that chemical reactions cannot break down?
an element
Which substance cannot be broken down by a chemical change?
All of the elements of the Periodic Table cannot be broken down into simpler substances.
Nonmetals during a chemical combinations tend to do what?
Non-metals during a chemical combinations tend to gain electrons. Metals in chemical reactions will tend to lose their electrons easily.
Is crashing a car chemical change?
No, though it is not easily irreversible like chemical reactions it is mainly a physical change, unless your car set in fire. (Burning is chemical)
Which part of an atom plays a major role in chemical reactions?
Chemical reactions are a result of valence electron transfer and/or sharing. Valence electrons are located in the outer-most orbitals of the reactant elements. In a sense, though, you could say protons are also involved in chemical reactions. Although an element will never donate, accept, or share protons in a CHEMICAL reaction, they are part of the determination in an elements reactivity. Reactions that do involve protons are termed "nuclear reactions," and are not chemical reactions. In fact, a lot of the methods used to determine chemical reactions -- such as enthalpy -- cannot even be applied to nuclear reactions. Neutrons, like protons are involved in nuclear reactions, but never in chemical reactions. Hope this helps!
Can nickel and copper be separated once mixed?
All mixtures can be separated easily, chemical reactions cannot.
Matter that does not enter chemical reactions is described as what?
Matter that does not enter chemical reactions is described as inert. This type of matter cannot be altered by chemical reactions.
What is a substance that chemical reactions cannot break down?
an element
How does the law of the conservation of mass apply to to chemical reactions?
Atoms cannot be added or lost in a chemical reaction.
What is the substance that cannot be split up into others?
Elements cannot be split using chemical reactions.
What is chemical and physical reactions?
A physical reaction is were the current substance can be changed in state and then changed back easily to it's previous state, a chemical reaction is the opposite, it is difficult to change it back to its previous state.
Rocks containing calcite are most easily weathered by the chemical process of what?
Acid-base reactions.
Can acid base reactions be reversible?
can the reaction between alkali and acid be reversed
What kinds of matter that cannot be converted into simpler substances in ordinary chemical reactions?
An element
What chemical reaction produces the sun and energy?
These are not chemical reactions but thermonuclear reactions.
Can a substance produced during a chemical change be easily changed back into the original substance?
No they cannot. Chemical changes never ever go back.
How are chemical reactions abbreviated?
Chemical reactions are abbreviated by their chemical equations.
