a) Group 2 elements have 2 electrons on their outer shell, so they form a 2+ charge.
b) they lose 2 electrons as they are transferred to the non metal.
c)They obtain this charge as when they are made into an ionic compound the 2 electrons on the outer shell are transferred to the non metal, meaning there are 2 more protons that electrons, giving it a positive charge.
hope this helps! :)
The answer is ii) the liquid called tea.
That is ii) the liquid called tea is a mixture.
the liquid called tea is a homogeneous mixture that contains organic and inorganic compounds, sugar(organic carbohydrate),tea leaf extract(organic), water(inorganic).
Whereas (iii) distilled water, is a pure substance while (I) gello is a colloid.
Answer:
The column of ethanol will be higher than the column of mercury.
Explanation:
The pressure (P) of a column of liquid can be calculated using the following expression.
P = ρ . g . h
where,
ρ: density of the liquid
g: gravity
h: height of the column
h = P / ρ . g
We can see that the height of the column is inversely proportional to the density of the liquid. The density of ethanol (0.789 g/mL) is lower than the density of mercury (13.6 g/mL). Then, under the same conditions, the column of ethanol will be higher than the column of mercury.
Answer:
This is an exothermic reaction
q = 563 kJ
Explanation:
Step 1: The balanced thermochemical equation
H2CO(g) + O2(g) → CO2(g) + H2O(l) ΔH = -563 kJ
This is a combustion, this means there will be released heat. This means it's an exothermic reaction.
The energy involved, will be released (that's why ΔH is negative)
q has the same value as ΔH (but positive)
q = 563 kJ
Answer:
I think sodium it may be wrong soŕry
