what is valency?what is modern periodic table?
Answers
Answer:
A shopkeeper bought 50 English books at the cost of rupees 2000 per 25 books and 75 Mathematics books at the cost of rupees 1500 per 15 books. Find:
(a) The cost price of the English books.
(b) The cost price of the Mathematics books.
(c) The cost price of all English and Mathematics books.
(d) If he sold the English books at rupees 95 per book, find his profit in English books.
(e) If he sold the Mathematics books at rupees 95 per book, find his profit or loss in Mathematics books.
Answer:
the combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with is valency
the combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with is valency The modern periodic table is used to organize all the known elements. Elements are arranged in the table by increasing atomic number. In the modern periodic table, each element is represented by its chemical symbol. ... Columns of the periodic table are called groups. Elements in the same group have similar properties.
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