The elements are identified by its aomic number and they are placed in the periodic table in ascending order of atomic number.
There is one unique element for a given atomic number.
For example, atomic number 1 identifies Hydrogen and there cannot be another different element with the same atomic number.
All the elements with atomic numbers from 1 to 118 have been discovered. So, you know that there is not room for new products with atomic number equal or less than 118.
Answer:
1 significant figure:
1000
2 significant figures:
670
0.0093
3 significant figures:
0.184
1.30
4 significant figures:
120.9
1.008
Explanation:
The significant figures of a number written in positional notation are digits that carry meaningful contributions to its measurement resolution. This includes all digits except: all leading zeros.
5 Rules for significant figures:
1: All non-zero numbers ARE significant.
2: Zeros between non-zero numbers ARE significant.
3: Leading zeros are NOT significant.
4: Trailing zeros to the right of the decimal ARE significant.
5: Trailing zeros in a whole number with the decimal shown ARE significant.
Look at the attachments for more examples.
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the answer to your question is
ρ≅13.0⋅g⋅mL−1 = 13.0⋅g⋅cm−3Explanation:Density=Mass Per unit Volume = 75.0⋅g(36.5−31.4)⋅mL =??g⋅mL−1Note that 1⋅mL = 1⋅cm−3; these are equivalent units of volume; i.e. 1⋅cm3 = 1×(10−2⋅m)3=1×10−6⋅m3=10−3⋅L=1⋅mL.
Answer:
B
Explanation:
parasites live inside the host
Solar eclipse only i believe