They are called lanthanoids!
A covalent bond means shared electrons between atoms. This is similar to kids sharing markers because the markers (electrons) are being shared between the kids (atoms). Covalent bonds are different than this metaphor because 1) the electrons are constantly moving about while the kids can steal and keep the markers and 2) the electrons and atoms are physically smaller
Answer is: reactivity series or activity series.
Reactivity series is an empirical progression of a series of metals, arranged by their reactivity from highest to lowest (alkaline metals have highest reactivity and Noble metals lowest reactivity). This series are used to summarize information about the reactions of metals with acids or water, double displacement reactions (more reactive metals displace metals with lower reactivity) and the extraction of metals from their ores.
Answer:
P₂ = 607 mmHg
Explanation:
Given data:
Initial volume = 4.5 L
Final volume = 5.6 L
Initial pressure = 756 mmHg
Final pressure = ?
Solution:
The given problem will be solved through the Boyle's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
756 mmHg × 4.5 L = P₂ × 5.6 L
P₂ = 3402 mmHg. L/5.6 L
P₂ = 607 mmHg
Answer:
Faster hydrogen burning means the star will grow larger and more luminous to allow the extra energy created to escape