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Lunna [17]
4 years ago
14

Why would elements found in the same group on the periodic table have similar reactivity’s

Physics
1 answer:
9966 [12]4 years ago
5 0

Answer:

D. They have the same number of valence electrons

Explanation:

In order to answer this question we need to understand the following.

  • Valence electrons refers to the outermost electron(s) in the outermost energy level of an atom.
  • Elements in the same group in the periodic table have the same number of valence electrons. For instance, group 2A elements have 2 valence electrons.
  • The reactivity of elements in the periodic table is based on the number of valence electrons and the ease of gaining or losing electrons.
  • Elements in the same group have similar valence electrons and therefore share similar chemical properties such as reactivity.
  • Hence, elements in the same group have same number of valence electron and will thus have similar reactivity.
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The 11 th one please! Somebody help me:(
photoshop1234 [79]

Answer:

203360Pa

Explanation:

Pressure= density of liquid*height*g

=1000*10*10

=100000Pa

Total pressure= water pressure + atmospheric pressure

=1000000+103360

=203360 Pascal

5 0
4 years ago
why is a person who lives in the city able to sleep through the sounds of traffic but awaken to the soft sound of bird singing
mash [69]

They grew up  to that sound. They love the sound of that same traffic sound.

5 0
3 years ago
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Older televisions display a picture using a device called a cathode ray tube, where electrons are emitted at high speed and coll
gregori [183]

Answer:

a)  t = 3.027 10⁻⁹ s ,  b)   y = 2.25 10⁻² m

Explanation:

We can solve this problem using the kinematic relations

a) as on the x-axis there is no relationship

          vₓ = x / t

          t = x / vₓ

We reduce the magnitudes to the SI system

          x = 5.6 cm (1m / 100 vm) = 0.056 m

we calculate

          t = 0.056 / 1.85 10⁷

          t = 3.027 10⁻⁹ s

b) the time is the same for the two movements, on the y axis

         y = v₀t + ½ a t²

         

as the beam leaves horizontal there is no initial vertical velocity

         y = ½ a t²

         

let's calculate

         y = ½  5.45 10¹⁵ (3.027 10⁻⁹)²

         y = 2.25 10⁻² m

6 0
3 years ago
Match the layer of Earth with its characteristic.
mote1985 [20]

Answer:

Explanation:

The Asthenosphere -- drives the movement in the plates

<em>It is a weak and flexible part of the upper mantle of the planet Earth.</em>

<em>It is located below the lithosphere. The depth of it is between 200 and 80 kilometers below the surface. It is usually solid but in some regions it is fluid. The temperature dictates the thickness of the Asthenosphere.</em>

The Core -- the hottest layer of the Earth.

<em>The inner Core of the Earth is a layer that's located in the core of it.  By definition, it is a rock-hard ball that has the radius of 1,220 kilometers, making it 20% of the Earth's radius and 70% of the Moon's radius. The samples are not discovered. It is believed that it has the composition of iron-nickel infusion along with other elements. The temperature is appx. 5430 °C, which is similar to the temperature of the surface of the Sun.</em>

Mesosphere -- contains the lower mantle

<em>By definition, it comes from the Greek word mesos, which means '' middle ''.</em>

<em>It is the third layer of the Earth. It is located above the stratosphere and below the thermosphere. The higher the altitude,  the lower the temperature. It ends in the coldest part of the Earth, Mesopause. And it begins at the Stratosphere.</em>

Lithosphere -- contains the tectonic plates

<em>By the definition, it is also a word that came from the Greek language. It comes from the word '' lithos '' which means '' rocky ''.</em>

<em>It is a hard, outer part of the Earth.</em>

<em>On the planet Earth, it is made out of the crust of the upper mantle.  The rocks from the Lithosphere are elastic.</em>

<em>They are two types of Lithosphere -- the oceanic Lithosphere and Continental Lithosphere.</em>

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6 0
4 years ago
Read 2 more answers
El tiempo que habria que esperar para que el dia fuera 1 hora mas largo que es hoy
myrzilka [38]

Answer: el tiempo que habria que esperar para que el dia fuera 1 hora mas largo que es hoy

Explanation:

8 0
3 years ago
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