Subject: Chemistry
Book: General Chemistry
The periodic table evolved from attempts to classify elements based on their atomic masses and properties. Dmitri Mendeleev’s 1869 arrangement left gaps for undiscovered elements, predicting their properties with remarkable accuracy. Later, Henry Moseley’s work on atomic numbers refined the table’s order. The periodic table remains central to chemistry, guiding research in discovering new elements and understanding chemical trends.
Which element is represented by the symbol 'Fe'?
View QuestionWhat is the chemical formula for ammonium nitrate?
View QuestionWhich element is represented by the symbol 'O'?
View QuestionWhich non-metal element is liquid at room temperature?
View QuestionWhich element is known as quicksilver?
View QuestionWhat is the chemical formula for calcium phosphate?
View QuestionWhich element has the atomic number 26?
View QuestionWhich element is used in thermometers?
View QuestionWhich element is essential for the formation of hemoglobin?
View QuestionWhat is the chemical formula for sodium hypochlorite?
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