Answer:
five electrons
Bromine (Z=35), which has 35 electrons, can be found in Period 4, Group VII of the periodic table. Since bromine has 7 valence electrons, the 4s orbital will be completely filled with 2 electrons, and the remaining five electrons will occupy the 4p orbital
Answer:
263 K
Explanation:
Assuming ideal behaviour and constant pressure, we can solve this problem by using Charles' law, which states that at constant pressure:
In this case:
We <u>input the data</u>:
- T₁ * 824.7 mL = 377 K * 575.45 mL
And <u>solve for T₁</u>:
Answer:
The volume of carbon (ii) oxide present is <u><em>2.80 L</em></u>
Explanation:
In this question, we are asked to calculate the volume of a certain number of moles of carbon (ii) oxide sealed in a container at STP
The equation to use here is the ideal gas equation.
Mathematically;
PV = nRT
since we are to calculate the volume, the equation can be re-written as
V = nRT/P
The values according to the question are as follows;
n is the number of moles which is 0.125 moles
T is the temperature at STP which is 0°C = 273.15 K(kelvin)
P is the pressure at STP which is 1.0 atm (atmosphere)
R is the molar gas constant which is 0.0821 L.atm.
Plugging these values, we have
V = (0.125 × 0.0821 × 273.15)/1 = 2.80 L
The word atom comes from the Greek word atomos, which means “undivided” or “uncut.” The Greek philosopher Democritus coined the term in the 5th century BCE. Democritus believed atoms were units of matter that could not be cut into smaller pieces. Atoms became the fundamental units of matter and the building blocks of elements. Eventually, scientists learned about subatomic particles. While no chemical process can divide an atom, nuclear fission and decay can break them into smaller units.