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4 years ago

Define valence electrons

Physics

2 answers:

fomenos4 years ago

8 0

Answer:

a single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom

lisabon 2012 [21]4 years ago

3 0

Answer:

In chemistry and physics, a valence electron is an outer shell electron with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.

Explanation:

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The density (mass/volume) of aluminum is 2.70 mc016-1.jpg 103 kilograms per cubic meter (kg/m3). What is the mass of an aluminum

Masja [62]

The answer is 4.05 × 10³ kg

The density (D) is a quotient of mass (m) and volume (V) of a substance:
D = m/V

Step 1. Calculate the volume o
We have:
D = 2.70 × 10³ kg/m³
V = 1.50 m³
m = ?

D = m/V
m = D * V
m = 2.70 × 10³ kg/m³ × 1.50 m³ = 4.05 × 10³ kg

8 0

3 years ago

Help me please this is for physics

Yuri [45]

<h2>Hello there! :)</h2>

It's a pleasure to be helping you today with your physics question!

Answer:

$23.1m/s$

Explanation:

We want to find the initial speed of the ball.

To do this, we have to apply the formula for the time of flight of a projectile:

$T=\frac{2_{v0~sin 0} }{g}$

where θ = angle of flight

g = acceleration due to gravity

v0 = initial speed

Therefore, substituting the given values into the formula, we have that:

$\boxed{4.2=\frac{2~x~_{v0~sin63} }{9.8}}$

⇒ 2 × $_{v0}$ ×0.8910= 9.8 × 4.2

⇒ $\boxed{{v0}=\frac{9.8~times~4.2}{2~times~0.8910}}$

$\boxed{{v0} =23.1m/s}$

That is the initial speed of the ball.

I hope this helps you!

Good Luck with your Assignment!

3 0

3 years ago

Activity 1

mylen [45]

Answer:

I don't know hhaha ammmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm I wish I could help

3 0

3 years ago

A parallel-plate capacitor is made from two aluminum-foil sheets, each 5.9 cm wide and 5.6 m long. Between the sheets is a Teflo

Zarrin [17]

Answer:

1.98 x 10⁻⁷ F

Explanation:

w = width of the sheet = 5.9 cm = 0.059 m

L = length of the sheet = 5.6 m

Area of the sheet is given as

A = L w = (5.6) (0.059) = 0.3304 m²

d = distance between the sheets = 3.1 x 10⁻⁵ m

k = dielectric constant of teflon = 2.1

Capacitance is given as

$C = \frac{k\epsilon _{o}A}{d}$

$C = \frac{(2.1)(8.85\times 10^{-12})(0.3304)}{3.1\times 10^{-5}}$

C = 1.98 x 10⁻⁷ F

5 0

4 years ago

Niels Bohr's important discovery was?

Tom [10]

In 1912, Bohr was working for the Nobel laureate J.J. Thompson in England when he was introduced to Ernest Rutherford, whose discovery of the nucleus and development of an atomic model had earned him a Nobel Prize in chemistry in 1908. Under Rutherford's tutelage, Bohr began studying the properties of atoms.

7 0

3 years ago

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