Which statement about the modem periodic table is FALSE? A) Elements are arrange

Question

Which statement about the modem periodic table is FALSE? A) Elements are arranged in order of increasing atomic number. B) A group is a vertical column of elements. Elements in the same group share similar chemical properties. c) A period is a horizontal row of elements. Elements in the same period share similar chemical properties. D) There are 8 main groups in the modem periodic table. E) There are 18 columns in the modem periodic table. Answer() Which describes the basic finding in Rutherford's Gold Foil Experiment? A) Atoms contain a small. dense positively charged region called the nucleus. C) Light is made up of particles called photons. D) Electrons have the magnetic property of spin. E) Radioactive atoms spontaneously decay and release large amounts of energy from the nucleus. Answer() What is the neutron number for an atom of the isotope _3^7Li? A) 3 B) 4 C) 7 D) 10 E) 7/3 Answer() What requirement must be met for two electrons to coexist in the sa

Explanation / Answer

Answers:

1.A period is a horizontal row of the element and elements in the same period share similar properties

(C ) : is false statement

2.The finding in Ritherford's Gold Foil Experiment indicated that

(A) : Atom contans a small dense positively charged region called the nucleus

3. The neutron number for an atom of the isotope 3Li7 is,

    (B) : 4

4.The requirement must be met for two electrons to coexist in the same orbital at ground stateis

(B) :The electrons must have opposite spin

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