According to their locations on the periodic table, argon (ar) and neon (ne) are a. ionic b. radioactive c. liquid metals d. noble gases

Option (D) is the correct answer.

Explanation:

Atomic number of neon is 10 and its electronic distribution is 2, 8. On the other hand, atomic number of argon is 18 and its electronic distribution is 2, 8, 8.

As both these elements have completely filled orbital and they have 8 valence electrons. Hence, both of them belongs to group 18 which is also known as noble gas group.

In the Periodic table, neon lies in period 2 and group 18. On the other hand, argon lies in period 3 and group 18.

Thus, we can conclude that according to their locations on the Periodic Table, argon (Ar) and neon (Ne) are noble gases.

explanation:

i think option no d is the correct answer

when 25.0 ml of 0.700 mol/l naoh was mixed in a calorimeter with 25.0 ml of 0.700 mol/l hcl, both initially at 20.0 °c, the temperature increased to 22.1 °c. the heat capacity of the calorimeter is 279 j/°c.

the equation for the reaction is:

naoh + hcl → nacl + h₂o

moles of hcl = 0.0250 l hcl ×

0.700

mol hcl

1 l hcl = 0.0175 mol hcl

volume of solution = (25.0 + 25.0) ml = 50.0 ml

mass of solution = 50.0 ml soln ×

1.00

ml soln

= 50.0 g soln

δt=t2-t1

= (22.1 – 20.0) °c = 2.1 °c

the heats involved are

heat from neutralization + heat to warm solution + heat to warm calorimeter = 0

q1+q2+q3=0

nδh+mcδt+cδt=0

0.0175 mol ×

δh

+ 50.0 g × 4.184 j·g⁻¹°c⁻¹ × 2.1 °c + 279 j°c⁻¹ × 2.1 °c = 0

0.0175 mol ×

δh

+ 439.32 j + 585.9 j = 0

0.0175 mol ×

δh

= -1025.22 j

δh=1025.22j0.0175 mol= -58 600 j/mol = -58.6 kj/mol