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3 years ago

Among the alkali earth metals, the tendency to react with other substances

Physics

2 answers:

kati45 [8]3 years ago

5 0

Answer is D hope this helps

padilas [110]3 years ago

4 0

Answer D
In alkali earth metals reacrivity increases from top to bottom (opposite of b)
This is because as you go down, the electron shells increase by 1 shell. The farther away a shell is from the nucleus, the higher its tendency to react.
D is true because the more reactive an alkali metal is, the more vigorous the reaction will be with water.

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1 year ago

A copper atom has an atomic number of 29 and an atomic mass of 64. What

Elina [12.6K]

Explanation:

Answer is B.

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2 years ago

Based on their colors, which of the following stars is hottest? Which is coolest? Archenar (blue), Betelgeuse (red), Capella (ye

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Answer: The hottest star is Archenar( blue) and the coolest star is Betelgeuse

Explanation:

Objects emit radiation that depends exclusively on their temperature. At an ambient temperature, the radiation emitted by an object is in the infrared spectrum (we could only see it with a special camera). If we heat it we will see that it first turns red (whose state we call “red hot”) because it is the lowest and least energetic wavelength of all.

If we continue to heat it, the wavelength that it emits to one with more energy will continue to increase and we will see that it turns yellow and then white. This is a signal that is emitting at all frequencies (but mainly in blue).

If we continue to warm a body that is "white hot", it would emit in the ultraviolet spectrum, with what would become ... black! then we would not see it emits light in the visible spectrum (well, we would see a very faint bluish light corresponding to the tail of the distribution of the spectrum it emits, but the peak of that spectrum would be in the ultraviolet).

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3 years ago

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A bird flies at a speed of 2.3 m/s if it has 14 j of kinetic energy what is the mass

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m = 14 / (0.5*2.3*2.3)

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3 years ago

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