Question 30 there are more than 100 chemical elements

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Si­29 Si­28 Si­30 All isotopes have the same natural abundance. 7 Li and 9 Be 18 O and 18 F 14 N and 15 N 32 S and 32 P
Question 30 There are more than 100 chemical elements that are identified in nature. The chemical symbols of the elements are denoted by either one or two letters. For example, the element oxygen is denoted by the letter . If the symbol has two letters, the first letter is always capitalized and the second is lowercase. For example, the symbol for the element helium is . The periodic table is the tabular arrangement of all the chemical elements that have been identified. The elements are arranged according to their atomic numbers and denoted by their symbols. This arrangement places elements of similar properties next to each other in the table. For example, metals are located on the left­ hand side and nonmetals are located on the right­hand side. Semimetals (metalloids) are placed between the metals and nonmetals, and have properties intermediate between metals and nonmetals. Part A Identify the chemical symbols corresponding to each element. Drag the appropriate labels to their respective targets. Hint 1. What a chemical symbol is A chemical symbol is shorthand for the name of an element. It uniquely identifies the element. The chemical symbol may be either one or two letters. If the symbol is two letters, the first letter is capitalized and the second is lowercased. For example, the chemical symbol for sulfur is , and the symbol for silicon is . In some cases, the chemical symbol is derived from the Latin or Greek name of the element. For example, the symbol of gold, , is derived from its Latin name, aurum , meaning “shining dawn.” Hint 2. Identify the Latin name of the elements Sometimes the chemical symbol of an element is derived from the Latin or Greek name for that element. Complete the following statements to identify the Latin names of the elements.
2017/2/28 Chp 4 A1 27/29 Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. ANSWER: ANSWER: Correct Once you know the symbols for the elements, it is easier to navigate the periodic table and write chemical equations and formulae. Each element has a unique symbol that is recognized throughout the scientific world. The chemical symbols are the alphabet of the universal language of chemistry. Part B A chemist classifying five elements determines the following: Element Property : Sulfur Soft yellow solid : Silver Shiny solid at room temperature that is also a good conductor of heat and electricity : Silicon Semiconductor : Neon Inert gas at room temperature : Mercury Silvery liquid that is used in thermometers and fluorescent lights Use these properties to classify the substances as metals, metalloids (semimetals), or nonmetals. Drag the appropriate elements to their respective bins. Help Reset 1. The Latin name for lead is plumbum . 2. The Latin name for antimony is stibium .

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