The words that fill in the blanks in order are;
- atoms
- Electrons
- shells
- Valence electrons
- Electron distribution
- Molecules
- Basic atoms
- Charge distribution
- Interact with other molecules electron
- Harm living organisms
Atoms are composed of electrons. These electrons are arranged in shells. The number of valence electrons (outermost shell electrons) determine the kind of bonds that can be formed in a molecule.
In a molecule, charges are distributed in a unique way and the charge distribution in a molecule determines how the molecule interacts with other molecules. Different molecules can be made by arranging the same basic atoms in different ways.
Harmful substances can be formed when atoms of elements combine in new ways in the environment.
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Answer: 2.81 x 10∧14 baterias after 16 hours.
Explanation:
Hi, first we have to find how many 20 minute intervals are in 16 hours.
If 1 hour = 60 min, 16hours = 960 minutes (16 h x 60 min / 1 h)
If we divide the 960 minutes (16 hours) by 20 minutes we obtain 48. (960/48)
There are 48 twenty minutes intervals in 16 hours.
Now we have to apply the exponential growth formula:
P (t) = Po (1 +r) ∧t
Where:
P (t) = population at time t
P (0) = initial population (1)
r = growth rate (1)
t = time (48)
Replacing with the values given:
P (t) = 1 (1 + 1) ∧48= 2.81 x 10∧14
2.81 x 10∧14 baterias after 16 hours.
The right answer is D.
The absorption of molecules at the level of the skin is carried out by passive diffusion for the molecules of low molecular weight (lower than 400 Da), the skin being covered with a lipoprotein film rich in water by its stratum corneum, rendering it little-permeable.
This absorption may be variable according to factors related to the skin such as stratum corneum's thickness, the state of hydration, the presence of cutaneous lesions or individual variations.
External factors may also modulate percutaneous absorption such as contact time, iontophoresis or the presence of specific adjuvants.
