-solid sulfur
-solid calcium
-gold
Answer: Option (a) is the correct answer.
Explanation:
Amorphous means without any crystalline structure or definite shape. Whereas a solid whose atoms are not bonded together in a definite lattice pattern. This solid is non-crystalline in nature.
For example, glass, gel, plastic etc are all amorphous solids.
Whereas solid sulfur, solid calcium, and gold have a definite lattice pattern and has a crystalline structure. Thus, they are not amorphous solids.
Thus, we can conclude that out of the given options glass is most likely to be amorphous.
Bombarding sodium-23 with a
proton produces nuclide X and a neutron. What is nuclide X?
Answers:
magnesium-24
magnesium-23
neon-23
s
odium-24
none of the above
The isotope P
has a half-life of 14.3 days. If a sample originally contained 1.00 g of P,
how much was left after 43 days?
Answers:
0.250 g
0.125 g
0.750 g
0.500 g
Identify X in the reaction
below.
U
+ C
→ Cf
+ X
Answers:
1
alpha particle
3
protons
6
neutrons
6
electrons
A .20 gram sample of C-14 was allowed to decay for 3 half-lives. What mass
of the sample will remain? Carbon-14 has a half life of 5730
years.
Answers:
0.025
0.05
0.1
0
.01
0.05
The isotope Cu
has a half-life of 30 s. If a sample originally contained 48 mg of Cu,
how much time passed before the amount fell to 3 mg?
Answers:
120 s
240s
30 s
60 s(when I did my calculation for the question above, I got 60 seconds)
What radionuclide decays to Fe-56
by beta emission?
Answers:
Fe
Co
Mn
Co
MnHow do I know wat it becomes. I put 57 Co 27 and it's wrong.
The Cf
to Cf
conversion is accompanied by __________.
Answers:
an alpha
emission
a
neutron capture
an electron
capture
an electron releaseI would greatly appreciate your help...ASAP. Thank you.
b. False
The answer would be (a.)True.
2 continents have the most obvious fit of the coastlines.
subject science
Two continents have the most obvious fit of the coastlines are the east coast of South America and the west coast of Africa.
According to the examination of a world map it reveals a striking match between the shapes of the east coast of South America and the west coast of Africa. Attached the map which shows the west coast of Africa in 1842 and also the map of the east coast of South America. According to the picture of the west coast of Africa in 1842, we can see Sierra Leone and Freetown, where the West India Regiments arrived and departed from.
Two continents have the most obvious fit of the coastlines are the east coast of South America and the west coast of Africa, because the east coast of South America and the west coast of Africa seem to fit together like pieces of a jigsaw puzzle.
Wegener discovered that their rock layers are fit just as it clearly. All the landmasses used to be one great landmass called Pangaea. Due to plate tectonics, fire movements in the mantle of the earth, the continents are slowly through millions of years, spread farther apart.
Grade: 9
Subject: chemistry
Chapter: coastlines
Keywords: coastlines