How do you convert 34.6 kilograms to micrograms? Also the Steps that got you that answer

Summarize the history of the periodic table

denis23 [38]

Periodic table is the representation of elements in an order

The history of periodic table can be summarized as

a) 1829 : Johann Dobereiner proposed the triad rule. According to him we can classify the elements in a triad where the atomic mass of middle element is average of atomic mass of the near by two atoms.

For example : Li, Na and K is a triad. Where atomic mass of Na is average of atomic mass of K

atomic mass of Na = 7+ 39 / 2 = 23

However, with the further discovery of elements the law was rejected.

b) 1864 : John Newland proposed the law of octave. According to him we can arrange the elements in a set of seven elements where the property of second set of seven elements will resemble the properties of first of seven elements or property will be repeated after seven elements. This was also rejected due to its limited applicability.

c) Meyer : He arranged some 28 elements into six different families based on their atomic masses. The members of each familiy shared some common properties.

d) 1869 : Mendleev : He actually developed a periodic table based on atomic mass of elements. He arranged the elements into groups and periods. He even left space for some undiscovered elements, which were later on discovered.

e) 1916 : Henry Moseley : He finally arranged elements based on their atomic number based on X-ray studies. He proposed the modern periodic law that the periodic properties of elements are due to atomic number of elements.

6 0

2 years ago

A temperature increase causes the particles to what ??!

lord [1]

To move around more. bounce off walls ect. they are more energised

6 0

2 years ago

2. Which is not true of an electric current?

daser333 [38]

B. Electric current requires a specific path to follow.

4 0

1 year ago

Four different objects are placed on a number line at 0. The chart describes the motion of each object. Using the information in

mote1985 [20]

The chart with the information to answer this question may be found in other Brainly's link, so I attach it now.

Answer:

Z

Explanation:

To facilitate the accompaniment of the reasoning, I copy the data here:

Object Motion

X 3 units left, 3 units right

Y 6 units right, 18 units right

W 8 units left, 24 units right

Z 16 units right, 8 units left

The distance is the scalar magnitude that indicates the total length of the path traveled.

The displacement is the vector that indicates how far the end point and the initial point are.

In order to calculate the distance, the displacement and the ratio r = distance/displacement, to check which object has a distance that is three times as great as its displacement, i.e. r = 3, we use this new chart:

Object Motion Distance Displacement ratio

X 3 units left, 3 units right 3 + 3 = 6 3 - 3 = 0 ∞

Y 6 units right, 18 units right 6 + 18 = 24 6 + 18 = 24 1

W 8 units left, 24 units right 8 + 24 = 32 -8 + 24 = 16 2

Z 16 units right, 8 units left 16 + 8 = 24 16 - 8 = 8 3

The ratios were calculated dividing the distance by the displacement: distance / displacement.

For the object Z, that was 24 / 8 = 3. Thus, the object that has a distance that is three times as great as its displacement is the object Z.

8 0

2 years ago

Read 2 more answers

Which description of nitrogen-15 is correct?

VashaNatasha [74]

The first one is correct cause first of all it's atomic number is 7 and second of all it's atomic mass is about 15

8 0

2 years ago