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3 years ago

7

Sodium is a shiny metal. When cut, it dulls quickly. It also reacts violently with water. Which of the following would probably

show the same characteristics?

1 answer:

siniylev [52]3 years ago

3 0

Answer:

jhgjghjghjghjgjhgjhgjhghjg

Explanation:

i need a crown

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How can so many different substances in the world be made of so few elements?

Mrrafil [7]

Matematically speaking, maybe because:
The number of substances = number of elements + number of different combinations of those elements

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Which of the following radiations consists of a helium nucleus emitted by some radioactive substances? Alpha radiation Beta radi

erica [24]

Answer: Alpha radiation

Explanation: Alpha decay : When a larger radioactive nuclei decays into smaller nuclei by releasing alpha radiation, the mass number and atomic number is reduced by 4 and 2 units respectively.

$_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}Y+_2^4\textrm{He}$

Beta decay : When a larger radioactive nuclei decays into smaller nuclei by releasing beta radiation, the atomic number is increased by 1 unit.

$_Z^A\textrm{X}\rightarrow _{Z+1}^{A}Y+_{-1}^0e$

Gamma decay : When a larger radioactive nuclei decays into smaller nuclei by releasing gamma radiation, the mass number remains same.

$_Z^A\textrm{X}^*\rightarrow _Z^A\textrm{X}+_0^0\gamma$

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3 years ago

What is one disadvantage of wind and hydroelectric power?OA. Their supplies are limited and only last a few years in a singlocat

Goshia [24]

Answer:

$C$

Explanation:

Here, we want to select a disadvantage of the power sources

The two listed are examples of renewable power sources with no level of pollution

However, in the case of wind, a wind turbine is needed and could only work in places where the wind is prevalent enough throughout the year. Likewise, hydroelectric power, can only work where we have a flowing water source

Thus, there is a bane of geographic and climatic restrictions serving as a disadvantage

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1 year ago