Building vocabulary
from the list below, choose the term that best completes each sentence.
atomic mass unit (amu) electron
family group
neutron
nucleus
period v periodic table
proton
10. a(n) valence
is involved in the transfer or sharing of electrons.
11. a(n) protons is a positively charged particle in the nucleus.
12. an element's period is its row in the periodic table.
13. the central core of an atom is called the nucleus
14. a(n)
carries a negative electrical charge, and is located
outside an atom's central core.
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15. mendeleev was the first to arrange elements according to their properties in
a(n)
16. elements in a(n)
_ог
of the periodic
table have similar characteristics.
17. a(n) nechtron is a particle in the nucleus that has no charge.
18. scientists use the atomic mass to measure the mass of the particles
within the atom. unit

You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.