Chemistry, 26.09.2019 15:30, quintinlarrieu

Group 1a elements (except for hydrogen) are known as the alkali metals.
a. true
b. false

Answers: 1

Show answers

Answers

The answer is true that Group 1A elements (except for hydrogen) are the alkali metals. Groups 2A are alkaline earth metals. Group 3B-12B are transition metals. Group 3A to 4A except Boron, Carbon, Nitrogen, oxygen, silicon, phosphorus, sulfur, germanium, astatine, selenium, antimony, tellurium, polonium are basic metal. Carbon, nitrogen, oxygen, phosphorus, sulfur and selenium are nonmetals. Boron, silicon, germanium, astatine, antimony, tellurium and polonium are metalloids. Groups 7A are halogens. Groups 8A are noble gases. The lower part of the periodic table are lanthanides and actinides.

answered: Guest

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts

answered: Guest

answer : (a) volume of the gas = 8.67 × $10^{-3}$ l

(b) second virial coefficient b = -1.21226 l/mole

solution : given, t = 300k

p = 20atm

z = 0.86

n = 8.2 mmoles = 8.2 × $10^{-3}$ moles

r = 0.082 l atm/k/mol

find, (a) volume of gas and (b) second virial coefficient b at 300k.

formula used : $z=\frac{pv}{nrt}$

and $z=1+\frac{b}{v}$

(a) $z=\frac{pv}{nrt}$

$v=\frac{znrt}{p}$

= $\frac{0.86\times 8.2\times[tex]10^{-3}$ \times 0.082\times 300}{20}[/tex]

= 8.67 × $10^{-3}$ l

(b) $z=1+\frac{b}{v}$

$b=(z-1)v$

= (0.00867-1) × 8.659

= - 8.5839 l/mole

Other questions on the subject: Chemistry

Chemistry, 22.06.2019 02:10, apowers6361

26. of of (aq) by (aq) is . if 50.00 ml of 1.05 m is to 25.00 ml of 1.86 m ,at be? ( no is toina of aof) , h.. (p. ). . .

Answers: 3

continue

Chemistry, 22.06.2019 14:00, claudia122752

Will mark brainliest how many electrons can be held in the energy level n = 4?

Answers: 1

continue

Chemistry, 22.06.2019 15:00, MilanPatel

How is the shape of the poem “peer” connected to its meaning?

Answers: 2

continue

Chemistry, 22.06.2019 15:20, shanyeah

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma

Answers: 1

continue

Do you know the correct answer?

Group 1a elements (except for hydrogen) are known as the alkali metals.
a. true
b. false...