The 28 is the sum of the protons and neutrons in the element silicon.
ALL silicon atoms have 14 protons in the nucleus, so we can turn this into an equation:
#protons + #neutrons = 28
14 + #neutrons = 28
#neutrons = 14
#protons = 14
Eh I can't comment
That's y
No-one knows that I enter this site
Only a cousin knows
Cz I've got a protective family lol
The half life of an isotope is the amount of time it will take for the given isotope to decay till the point where it reaches half of what amount you had started with.
If the half life of Ra-229 is 4 minutes then every 4 minutes the sample is reduced to half of what you had before
4 minutes.) 50/2 Ra-229 --> 25g Ra-229
8 minutes.) 25/2 Ra-229 --> 12.5 Ra-229
12 minutes.) 12.5/2 Ra-229 --> 6.25 Ra-229 remaining
<em>I beleive this is the correct answer</em>
Answer:
Ionization is defined as the process by which the atoms accept or donate electrons and form positively or negatively charged species, called ions.
The ionization of water is known as the self-ionization or autoionization of water. This process involves the deprotonation of a water molecule and protonation of another water molecule to give hydroxide ion and hydronium ion, which exist in the state of chemical equilibrium.
H₂O + H₂O ⇌ H₃O⁺ + OH⁻
The pH of pure water is 7, neutral.
Answer:
About 0.566 L.
Explanation:
Let the substance be represented by <em>X</em>.
We want to determine how much volume in L will 8,326 dg (decigrams) of the substance which has a density of 1.47 g/mL occupy.
To convert from 8,326 dg to L, we can first convert from dg to g, g to mL using the density, and mL to L.
Recall that 1 g = 10 dg and 1 L = 1000 mL. We are also given that the density of <em>X</em> is 1.47 g/mL. This yields three ratios:
Starting with the initial value, multiply:
Hence, 8,326 dg of the substance occupies about 0.566 L.
