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HACTEHA [7]
3 years ago
11

Write the symbol for every chemical element that has atomic number less than 14 and atomic mass greater than 23.3 u.

Chemistry
1 answer:
ycow [4]3 years ago
6 0

Answer: Magnesium and Aluminum Mg & Al

Explanation:Magnesium's atomic mass is 24.31 and Aluminum's atomic mass is 26.98.

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Explain how low atomspheric oxygen levels affected alligators growth in terms of celluar respiration
Paraphin [41]

Answer:

Answer: Hyperoxic alligators show significantly lower breathing rates than their siblings in normoxic and hypoxic groups. Conversely, each breath supports greater oxygen consumption in hyperoxic animals than in other groups. Statistical significance between groups was calculated by ANOVA with post hoc Tukey-Kramer

3 0
3 years ago
Highest ionization energy: Li, Be, B
Ad libitum [116K]

Hello!


On the periodic table, as we go down the periodic table, the ionization energy decreases, but as we go across the periodic table (left to right), the ionization increases.


On the periodic table, lithium (Li) is located in column one, beryllium (Be) is located in column two, and (B) boron is located in column 13. As stated above, when we go across the periodic table (left to right), the ionization increases.


Therefore, the element with the highest ionization energy is Boron, or symbol B on the period table.

3 0
3 years ago
Bromine (Br) belongs to the halogen family. Based on the location of the halogens, how many valence electrons does bromine have?
Amanda [17]

Answer:

D. 7

Explanation:

The halogens are found in Group 7 of the Periodic Table. If Bromine is a halogen, then that means it would be found in Group 7. Also, elements in Group 7 have 7 electrons in its outer shell, Bromine would have 7 electrons in its outer shell.

3 0
3 years ago
Read 2 more answers
Which statement accurately describes non renewable energy sources ?
xz_007 [3.2K]

a resource that cannot be replenished in a short period of time

5 0
3 years ago
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Boron has two isotopes, Boron 10 which has a mass of 10.0129 amu and Boron-11 with a mass of 11.0093 amu. B-10 occurs 84.74% of
podryga [215]

The average atomic mass of Boron: 10.431 amu

<h3>Further explanation   </h3>

Isotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.  

So Isotopes are elements that have the same Atomic Number (Proton)  

Atomic mass is the average atomic mass of all its isotopes  

In determining the mass of an atom, as a standard is the mass of 1 carbon-12 atom whose mass is 12 amu  

Mass atom X = mass isotope 1 . % + mass isotope 2.%  + ...

The average atomic mass of boron :

\tt avg~mass=0.8474\times 10.0129+0.1526\times 11.0093\\\\avg~mass=10.431~amu

3 0
3 years ago
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