Answer;
-(3) an atom in an excited state
Explanation;
-An electron in a sodium atom gains enough energy to move from the second shell to the third shell. The sodium atom becomes an atom in an excited state.
-Ground state is the lowest allowable energy state of an atom. When electrons are subjected to stimuli like heat, light or electricity an electron may jump to a higher energy level, which is the excited state. Excitation is the elevation in energy level above the baseline energy state.
A. Elements cannot be broken down into simpler substances.
B. Elements are represented by chemical formulas.
C. Elements are pure substances.
D.Elements can combine chemically to form compounds.
Answer:
It is B.
All the other answers are true.
A element can not be simpler
The correct answer is B. Elements are represented by chemical formulas.
Out of the given options, the correct answer is B. Elements are represented by chemical formulas.
Chemical formulas are used to represent compounds, not elements. Elements are pure substances that are made up of only one type of atom and cannot be broken down into simpler substances. They are represented by their chemical symbols, such as H for hydrogen and O for oxygen.
For example, water is a compound made up of two elements: hydrogen and oxygen. The chemical formula for water is H2O, where H represents hydrogen and O represents oxygen.
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Answer:
Mass is how much matter an object has. Weight is how much gravity an object is being acted upon.
Explanation:
The mass of an object will stay the same no matter where you place it. But if you were to place the object, in the moon for example, then the weight of the object would be less since there is less gravity on the moon.
Answer:
The larger the species, the further away from the nucleus the outer electrons are and hence the less strongly they are held. This means the bigger atoms will be more polarizable. So, the order from biggest-smallest molecules (strongest to weakest IMF) is iodine, bromine and finally chlorine.
Explanation: