Look at the colours Or Inree anerent indicators. Teams
result with
Assignments
acid
alkali
neutral
indicator A
red
blue
purple
Calendar
indicator B
red
yellow
orange
indicator
colourless
pink
colourless
.
Aluminium sulfate is used in water purification,
Zaon tests aluminium sulfate solution with three indicators A, B and C.
Here are his results.
result with
Indicator A
Indicator C
indicrtor B
red
aluminium sulfate
red
colourless

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)