SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Elements that occur in vertical columns on the periodic table.
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A horizontal row of elements in the periodic table
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Found in group two of the periodic table; highly reactive
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A subatomic particle that has a negative charge
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Detailed explanation-1: -The horizontal rows in the modern periodic table are called periods. The modern periodic table contains 7 periods .
Detailed explanation-2: -The horizontal rows in the periodic table are periods, while the vertical rows are called groups.
Detailed explanation-3: -A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.
Detailed explanation-4: -So, horizontal rows in the periodic table are known as periods. Q. Which of the following statement about the modern periodic table is correct?
Detailed explanation-5: -The horizontal rows are called period and the vertical columns are called groups.