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poizon [28]
3 years ago
11

A fossil is any natural evidence of prehistoric life that provides some idea of the size, shape, or form of the organism. A foss

il does need not to be a whole animal or plant. Broken fragments are also fossils, as are the tracks left behind by the organisms. Fossils provide important evidence of how life and environmental conditions have changed. The fossils found in rock formations of different time periods differ because the environment on Earth has changed.
Position of land masses of early Pennsylvania can be determined through fossil records because we know that most plants presently live on land. From this information, we can infer?
Chemistry
1 answer:
ziro4ka [17]3 years ago
5 0

Continent drifts

Explanation:

The use of fossil evidences to support the correlation of land masses that are presently not together can suggests that continents do move and land masses can change position.

This was one of the earliest prove suggest by Alfred Wegener to back up his theory of continental drift.

  • Since fossils are evidence of prehisotric life, a place originally together should have the same fossil contents.
  • When they become separated, the fossil contents in their lithology should match.

learn more:

Continental drift brainly.com/question/5002949

#learnwithBrainly

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What is the noble gas configuration for telleurium
Maru [420]

[Kr] 4d10 5s2 5p4 is the noble gas configuration for telleurium because of the presence of different number of electrons.

<h3>What is telleurium?</h3>

Tellurium is a noble gas element that is non-reactive in nature due to complete outermost shell. It has atomic number of 52 which means that it has 52 number of electrons.

So we can conclude that [Kr] 4d10 5s2 5p4 is the noble gas configuration for telleurium because of the presence of different number of electrons.

Learn more about noble gas here: brainly.com/question/13715159

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4 0
2 years ago
Quiz. Formula Weight and % Composition
astraxan [27]

Answer:

#1- the percentage is 2.77%

#2 - 218.1336g

#3- 7.89%

#4- 63.8489g

#5- 136.1406g

#6- 340.3515g

#7- 2.387238

#8-  

Explanation:

7 0
3 years ago
Use the drop-down menus to complete each sentence.
Ipatiy [6.2K]

Explanation:

Elements that belong to same group contains same number of valence electrons. Hence, they tend to show similar chemical properties.

When we move across a period then number of electrons get added to the same shell. As a result, there will be no increase in size of elements.

Also, metals are the elements that belong to group 1, 2 and d-block elements are also known as metals. Metallic character of elements decreases when we move left to right in a periodic table.

As most reactive metals are placed on the left side of periodic table.

Since, size of elements increases on moving down the group. So, an element is able to easily lose its valence electrons because of less force of attraction between its nucleus and valence electrons.

As a result, there will be increase in reactivity of metals on moving down the group.

Thus, we can conclude that given sentences are as follows.

  • Elements in the same group have the same number of valence electrons.
  • Elements in the same period have the same number of electron shells.
  • Metallic elements become less reactive as you move left to right in a period.
  • Metallic elements become more reactive as you move top to bottom in a group.
3 0
3 years ago
Read 2 more answers
Write the oxidation number for the following elements: for brainliest answer
ollegr [7]

Explanation:

Here's an oxidation chart to help

..................

6 0
3 years ago
Which statement is true for nuclear reactions but not for chemical reactions?
IrinaVladis [17]

Answer:maybe C

Explanation:

4 0
2 years ago
Read 2 more answers
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