All categories

2 years ago

What are five key accomplishments of Marie Curie?

Chemistry

1 answer:

shusha [124]2 years ago

5 0

Her discovery of radium and polonium.

She was the first woman to win a nobel prize and a second one as well!

Marie Curie was the first women to be appointed as the director of the physics lab at Sorbonne.

She was also the first woman to become a professor at the University of Paris.

She helped make radiology units which were again portable and those assisted the field surgeons during the war.

Hope this helps :))

You might be interested in

What are the atomic numbers for sodium,iron and sulfur???

Nastasia [14]

Answer: sodium-11 iron-26 sulfur-16

Explanation:

3 0

2 years ago

Read 2 more answers

A Y particle is a what

elena-s [515]

Answer:

The answer is Gamma ray .

(Correct me if I am wrong)

3 0

3 years ago

1. Calculate the attractive bonding force for NaF and for MgO when the ions just touch. Based on the attractive bonding force, w

Andreas93 [3]

Answer:

The attractive force is negative and MgO has a higher melting point

Explanation:

From Couloumb's law:

Energy of interaction, E = k $\frac{q1q2}{r}$

where q1 and q2 are the charges of the ions, k is Coulomb's constant and r is the distance between both ions, i.e the atomic radii of the ions.

If you look at Coulomb's law, you note that in the force is negative (because q1 is negative while q2 is positive).

In addition to that, the compounds MgO and NaF have similar combined ionic radii, then we can determine the melting point trend from the amount of energy gotten

The melting point of ionic compounds is determined by 1. charge on the ions 2. size of ions. while NaF has smaller charges (+1 and -1), MgO (+2 and -2) has larger charges and greater combined atomic radii. This implies that the compound with greater force would have a higher melting point.

Hence the compound MgO would have a higher melting point than NaF.

5 0

3 years ago

Write the formula for each of the following compounds: a. sulfur difluoride b. sulfur hexafluoride c. sodium dihydrogen phosphat

Bogdan [553]

Answer:

a. sulfur difluoride SF₂

b. sulfur hexafluoride SF₆

c. sodium dihydrogen phosphate NaH₂PO₄

d. lithium nitride Li₃N

e. chromium(III) carbonate Cr₂(CO₃)₃

f. tin(II) fluoride SnF₂

g. ammonium acetate NH₄(CH₃COO)

h. ammonium hydrogen sulfate NH₄(HSO₄)

i. cobalt(III) nitrate Co(NO₃)₃

j. mercury(I) chloride Hg₂Cl₂

k. potassium chlorate KClO₃

l. sodium hydride NaH

Explanation:

The names give us information about the composition. First, we mention the cation and then the anion. In the formula, we follow the same order. Each part has a charge but the resulting compound is electrically neutral.

7 0

2 years ago

the distance between atomes is sometimes given in picometers,where 1pm is equivalent to 1×10^12m if the distance between the car

grigory [225]

Answer:

Distance between the carbon atom = 491 pm

Explanation:

Given:

1 pm = 1 × 10⁻¹² m

Distance between the carbon atom = 2.81 × 10⁻⁸ cm

Find:

Distance in picometers

Computation:

Distance between the carbon atom = 2.81 × 10⁻⁸ cm = 491 X 10⁻¹² m

Distance between the carbon atom = 491 pm

3 0

3 years ago