Home › CBSE Class 11 (Science) › Chemistry › Classification of Elements › What name is given to the horizontal rows of ele…
What name is given to the horizontal rows of elements in the long form periodic arrangement?
AGroups
BBlocks
CFamilies
DPeriods
Answer & Solution
Correct answer: D. Periods
Horizontal rows, which Mendeleev called series, are named periods while vertical columns are groups.
Related questions
Down a group, why do metallic properties generally increase?What is nuclear charge defined as?How does nucleophilicity generally change from left to right across a period?From group 1 to the noble gases, how does valency change?Ionization energy is also referred to by which other name?In group 13, how does electronegativity change from boron to thallium?Down a transition group, ionization enthalpy shows what trend versus main groups?Carbon monoxide, nitric oxide and nitrous oxide are examples of which type of oxide?