An element with atomic number 6 undergoes ?- decay. Its atomic number is now
A)
7.
B)
6.
C)
5.
D)
3.
E)
2.
A
Physics & Space Science
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In silica glass (SiO2), there is no long-range order, but there is ______________-range order.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
A 12-V battery is connected across a 100-? resistor. How many electrons flow through the wire in 1.0 min? (e = 1.60 × 10-19 C)
A) 1.5 × 1019 B) 2.5 × 1019 C) 3.5 × 1019 D) 4.5 × 1019
Physics & Space Science
Land subsidence is caused by
A) groundwater pumping. B) clay layers that shrink. C) gophers. D) over-pumping of groundwater and the compaction of clay layers.
Physics & Space Science
Exclusion Principle: The elements in the periodic table that have completely filled shells or subshells are referred to as
A. noble gases. B. halogens. C. alkali metals. D. transition elements.
Physics & Space Science