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AysviL [449]
3 years ago
11

The properties of elements can be predicted by which of the following? Where it is on the periodic table Where it was discovered

Its color in its natural state Its name
Chemistry
2 answers:
lubasha [3.4K]3 years ago
7 0

Answer:

A. Where it is on the periodic table

Explanation:

I got it right on FLVS

grandymaker [24]3 years ago
3 0

Answer:

Where it is on the periodic table

Explanation:

The periodic table is a table that provides a systematic pattern for arranging elements.

The table is based on the periodic law. The modern version of the periodic law states that " the properties of elements are periodic function of their atomic number".

In the modern periodic table, elements having the same number of electrons in their outermost shell are placed over one another in a vertical column.

Elements in the same group exhibits similar chemical properties because of the same number of electrons in their outermost shell. Physical properties also varies progressively down any group.

So, the position of an element on the periodic table determines its properties.

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Greg is correct, Jill is wrong. Only heat can be released.
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How did thompson know the charge of the particle he discovered was negative?
bulgar [2K]

Answer:

Explanation:

The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.

Symbol= e-

Mass= 9.10938356×10-31 Kg

It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.

He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.

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The ray is travel in straight line.

The cathode ray is independent of composition of cathode.

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Hence it was consist of negatively charged particles.

8 0
3 years ago
1. What is the mass of a rock that has a density of 2.5 grams per cubic centimeter and a volume of 4.0
dangina [55]

Answer:

Explanation:

d =

m

V

m = d×V

V =

m

d

DENSITY

Density is defined as mass per unit volume.

d =

m

V

Example:

A brick of salt measuring 10.0 cm x 10.0 cm x 2.00 cm has a mass of 433 g. What is its density?

Step 1: Calculate the volume

V = lwh = 10.0 cm × 10.0 cm × 2.00 cm = 200 cm³

Step 2: Calculate the density

d =

m

V

=

433

g

200

c

m

³

= 2.16 g/cm³

MASS

d =

m

V

We can rearrange this to get the expression for the mass.

m = d×V

Example:

If 500 mL of a liquid has a density of 1.11 g/mL, what is its mass?

m = d×V = 500 mL ×

1.11

g

1

m

L

= 555 g

VOLUME

d =

m

V

We can rearrange this to get the expression for the volume.

V =

m

d

Example:

What is the volume of a bar of gold that has a mass of 14.83 kg. The density of gold is 19.32 g/cm³.

Step 1: Convert kilograms to grams.

14.83 kg ×

1000

g

1

k

g

= 14 830 g

Step 2: Calculate the volume.

V =

m

d

= 14 830 g ×

1

c

m

³

19.32

g

= 767.6 cm³

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What advantage does a heterogeneous catalyst provide over a homogeneous catalyst in industrial processes?
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