melis64
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04-05-2021
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riyamshnawa
riyamshnawa
04-05-2021
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Which of these elements has the lowest melting point? (1) Li (3) K (2) Na (4) Rb
Which radioisotope undergoes beta decay and has a half-life of less than 1 minute? (1) Fr-220 (3) N-16(2) K-42 (4) P-32
In which shell are the valence electrons of the elements in Period 2 found? (1) 1 (3) 3 (2) 2 (4) 4
The region that is the most probable location of an electron in an atom is (1) the nucleus (3) the excited state(2) an orbital (4) an ion
Isotopes of an element must have different (1) atomic numbers (2) mass numbers (3) numbers of protons (4) numbers of electrons
Which element is a metal that is in the liquid phase at STP? (1) bromine (3) hydrogen (2) cobalt (4) mercury
Which particle has the least mass? (1) alpha particle (3) neutron(2) beta partic1e (4) proton
An example of a physical property of an element is the element’s ability to(1) react with an acid(2) react with oxygen(3) form a compound with chlorine(4) form
A 3 by 4 rectangle is inscribed in circle. What is the circumference of the circle? a. 2.5π b. 3π c. 5π d. 4π e. 10π
What was the Mayflower Compact? the ship that transported the Pilgrims to America the colonial legislature of Virginia the agreement in which the Pilgrims agree
