Answer:
b I beleive
Explanation:
the shape of a liquid changes based on the container it is in, but the volume stays the same
Answer:
this shape is called bent or angular. a molecule with four electron groups around the central atom orients the four groups in the direction of a tetrahedron.if there are four atoms attached to these electron groups then the molecular shape is also tetrahedral.
Explanation:
Hope this helped Mark BRAINLEST!!!!!
Answer:
v = 301.62 km/s
Explanation:
Given that:
The work function of the magnesium = 3.68 eV
Energy in eV can be converted to energy in J as:
1 eV = 1.6022 × 10⁻¹⁹ J
So, work function =
Using the equation for photoelectric effect as:
Also,
Applying the equation as:
Where,
h is Plank's constant having value
c is the speed of light having value
m is the mass of electron having value
is the wavelength of the light being bombarded
v is the velocity of electron
Given,
Thus, applying values as:
v = 3.0162 × 10⁵ m/s
Also, 1 m = 0.001 km
So, v = 301.62 km/s
C. Yes, all 12.7 grams will be in the flask.
Explanation:
The scientist will still be able to recover enough magnesium chloride from the original flask to continue with her experiment.
The solution formed with the solute, magnesium chloride dissolve in water is a mixture.
When the water evaporates, it will leave the magnesium chloride behind. Every atom of the chloride would still be in the flask.
Only the water will leave the solution
learn more:
Evaporation brainly.com/question/10972073
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Answer:
Property Family Group
react vigorously with metals halogens 17
can be cut with a knife alkaly metals 1
don't react with any other elements noble gases 18
Explanation:
<u>Noble gases</u> are placed in the group 18 of the periodic table. This family is formed by He, Ne, Ar, Kf, Xe, Rn, and Og. Since they have their valance shell complete, they tend to not react with other elements. Nevertheless, nowadays it is known that they can form some compounds.
<u>Alkaly metals</u> are placed in the the group 1 of the periodic table. This family is formed by Li, Na, K, Rb, Cs, and Fr. They have 1 valence electron which makes them the most active metals. They are known because they are soft and can be cut by a knife, like they were butter.
<u>Halogens </u>are placed in the group 17 of the periodic table, This family is formed by F, Cl. Br, I, At, and Ts. They have seven valence electrons, which make them very active and ready to combine with metals either covalently or ionically.