Answer:
True
Explanation:
it cant because unless it is a chemical reaction
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Answer:
Note about significant digits:
1. Both isotope mass figures, 111.9 amu and 115.9 amu, have 4 signficant digits.
2. You can assume that the relative abundance (93.5% and 6.5%) are exact to the extense that they do not affect the precision of the measures, so the result will contain the same number of significant digits as the isotope mass, i.e. 4
Entry (answer)
50 ← atomic number
Sn ← chemical symbol
112.2 ← atomic mass
Explanation:
Table of data
Mass spectroscopic analysis
Isotope mass relative abundance
(amu)
¹¹²Sn 111.9 93.5%
¹¹⁶Sn 115.9 6.5%
Then entry in the periodic table consists of the chemical symbol (Sn), the atomic number above the symbol, and the atomic mass below the symbol.
<u>1) Atomic number</u>
The atomic number is the same in any planet, as it is the number of protons and identifies uniquely the element. So, tin (Sn) has 50 protons in any place and the atomic number is 50.
<u>2) Atomic mass</u>
Atomic mass is the weigthed average of the atomic masses of the element in its nature state; so it depends of the relative abundance, and si calculated with this formula:
- atomic mass = ∑ (relative abundance × atomic mass) of each isotope.
- atomic mass Sn = %¹¹²Sn × relative abundance ¹¹²Sn + %¹¹⁶Sn × relative abundance ¹¹⁶Sn
- atomic mass Sn = 93.5% × 111.9 amu + 6.5% × 115.9 amu = 112.16 ≈ 112.2 amu
To keep 4 significant figures the number 112.16 hast to be rounded the closest number with one decimal, which is 112.2 (112.16 is closer to 112.2 than to 112.1)
Answer is: A) Sr (strontium).
The reactivity series<span> is a series of metals from highest to lowest reactivity.</span><span> Metal higher in the reactivity series will displace another.
</span>Strontium is only higher in this group from magnesium. Strontium is stronger reducing agent than magnesium, gives electrons easier.
Radio waves. Microwaves would cook the earth, seismic waves would just cause earthquakes everywhere, and infrared waves would also cook the earth.
Reactants are NaHCO3 and HC2H3O2 because they are on the left side of the arrow, aka they’re what’s going in to make the products. NaC2H3O2, H2O and CO2 are the products bc they’re on the right side of the arrow, aka they are the results of the reactants combining