GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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atoms and mixtures
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mixtures and compounds
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atoms and elements
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elements and compounds
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Detailed explanation-1: -A chemical symbol is a one-or two-letter designation of an element. Compounds are combinations of two or more elements. A chemical formula is an expression that shows the elements in a compound and the relative proportions of those elements. Some elements have symbols that derive from the Latin name for the element.
Detailed explanation-2: -A chemical equation is a shorthand way of writing a chemical reaction using chemical symbols and formulas.
Detailed explanation-3: -chemical formula represents one molecule of an element or a compound. The chemical formula for an element is represented by the symbol of the element followed by its atomicity in subscript. For example the chemical formula of Calcium is (Ca), Magnesium is (Mg), and Silver is (Ag).
Detailed explanation-4: -Compounds are represented by chemical formulas. Elements in a compound are represented by chemical symbols, and the ratio of different elements is represented by subscripts.
Detailed explanation-5: -A chemical symbol is a shorthand way of referring to a specific chemical element. If the chemical symbol is one letter, it is capitalized. If it is a two-letter chemical symbol, only the first letter is capitalized. Often, the chemical symbol is the first or the first two letters of the name of the element.