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Katarina [22]
3 years ago
9

PLEASE HELP!!

Chemistry
1 answer:
Zepler [3.9K]3 years ago
3 0

Answer: (a)

Decrease of two in atomic number and a decrease of four in mass number

Explanation:

The effect on the nucleus of an atom if it emitted one alpha particle and one gamma ray is:

Alpha (α) particles are like He+2 nucleus which has 2 protons and 2 neutrons. Thus after emitting α particles there will be decrease of atomic number by 2 and mass number will be decreased by 4. And the emission of gamma ray does not produce effect on the number of protons and neutrons.

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What term and what definition..
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3 years ago
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What percent of earths total volume is the crust
vlada-n [284]

1%

Explanation:

The crust is the thinnest layer of the earth accounting for only 1% total volume of the planets.

Compositionally, the earth is divided into three layers which are the crust, mantle and the core.

  • The crust is the outermost layer of the earth. It rich in silicate minerals. The rocks are classified into igneous, sedimentary and metamorphic rocks.
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7 0
3 years ago
A piece of metal with a mass of 114 g was placed into a graduated cylinder that contained 25. 00 ml of water, raising the water
alexgriva [62]

The density of the metal is 6.51 g/cm3 .

<h3>What is density, for instance?</h3>

How much "stuff" is contained in a specific quantity of space is determined by its density. For instance, a block of the harder, lighter material gold (Au) will be denser than a block of the heaviest element lead (Pb) (Au). Styrofoam blocks are less dense than bricks. Mass per unit size serves as its definition.

Briefing :

mass, m = 114 g

initial volume, V1 = 25 mL

final volume, V2 = 42.5 mL

Volume of the metal piece, V = V2 - V1

                                                 = 42.5 - 25

                                                 = 17.5 mL

1 mL = 1 c.c

So, Volume of metal, V = 17.5 c.c.

Let the density of the metal is d.

density = mass / volume

         d = 114 / 17.5

            = 6.51 g/c.c

Thus, the density of metal is 6.51 g/c.c.

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3 0
1 year ago
25.2 mL of water are placed in a graduated cylinder. A 22.6 g stone is dropped in, and the water level rises to 32.4 mL. Find th
VMariaS [17]
<span>Displaced volume :

final volume - initial volume

32.4 mL - 25.2 mL => 7.2 mL

Density = mass / volume

D = 22.6 g / 7.2 mL

D = 3.1388 g/mL

hope this helps!</span>
5 0
2 years ago
= Br<br> = C<br> Name is<br> 1<br> , formula is
sergeinik [125]

Answer:

yqujsbr

Explanation:

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