Answer:
Element X is Arsenic (As)
Explanation:
- Elements in the periodic table are either metals, non-metals or metalloids.
- Metals are elements that react by losing electrons to obtain a stable configuration and form cation.
- Non-metals are those elements that react by gaining electrons to form a stable configuration and form anion.
- Metalloids are elements in the periodic table that have both metallic and non-metallic properties.
- Examples of metalloids include Selenium, Arsenic, Boron, etc.
- Arsenic is a metalloid in period 4 (four energy levels) with five valence electrons.
Answer:
The final volume of the metal and water is 54.46mL
Explanation:
Hello,
To solve this question, we'll first of all find the volume of the metal and assuming there's no loss of water by overflow in the container, we'll add the volume of the metal to the volume of the water to get the final volume.
Data;
Mass of the metal = 45.5g
Volume of the water = 45mL
Density of the metal (ρ) = 3.65g/mL
Density of the metal = mass / volume
ρ = mass / volume
Volume (v) = mass / density
Volume = 45.5 / 3.65
Volume = 12.46mL
The volume of the metal is 12.46mL.
When the metal is added to the container 45mL of water, assuming no water was lost by overflow in the container, the final volume =
Final volume = volume of metal + volume of water
Final volume = 12.46 + 45.0
Final volume = 57.46mL
The final volume of the metal and water is 57.46mL
This would support Dalton's postulates that says atoms are indivisible because there are no smaller particles than the atoms.
Explanation:
If during Thomson's cathode rays experiment, the size of the particles produced is the same as the size of the atom forming the cathode, it would perfect corroborate with Dalton's postulate.
- John Dalton believed the simplest substance of any matter is an atom.
- An atom is indivisible and cannot be broken down.
- From his atomic theory, matter does not any other smaller particles besides atom.
- If the size of the atoms of rays and that of the cathode were to be the same, this would have supported his claim.
learn more:
Dalton's model of the atom brainly.com/question/1979129
#learnwithBrainly
$6.72/lb = $6.72/16 oz = $0.42/oz = 42 cents per ounce
<span>RE: "numerically to the hundredths place." </span>
<span>Since, in this case, you're dealing with money, "the hundredths place" simply means, "to the nearest cent."</span>
