What two elements are used to make a laser pen light?

Which element is most likely to allow electricity to pass through it?

yKpoI14uk [10]

Hello,
I have attached a periodic table to allow you to further understand my answer. We know elements are categorized in groups of Metals, Nonmetals, and metalloids. Let’s analyze each element. Sulfur is a nonmetal which mean it does not conduct well and does not have a good appearance, the same applies to all the other non metals on this list, including sulfur and helium. Copper is our only answer in which it fits and electricity can pass through/conduct easily. So our answer is copper. I hope this helps you with your assignment.

4 0

3 years ago

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The proton number of barium (Ba) is 56. It is in Group II of the periidic table how many electrons would you expect a barium ato

ella [17]

Answer:

A barium atom would be expected to contain 2 electrons in its outer energy level.

Explanation:

The columns of the periodic table are called groups. There are eighteen groups, numbered from 1 to 18.

The elements of each group have the same number of electrons in their last atomic shell, which is why they have similar chemical properties, because the chemical properties of chemical elements are strongly related to the electrons located in the last atomic shell.

That is, in a group, the chemical properties are very similar, because all the elements of the group have the same number of electrons in their last or last shells.

A barium atom would be expected to contain 2 electrons in its outer energy level.

7 0

3 years ago

Which statement correctly describes a reaction in dynamic equilibrium?

Andre45 [30]

Answer:

The answer is B - At dynamic equilibrium, the reactions continue but the amounts of reactants and products do not change.

Explanation:

got it right on Edge

4 0

3 years ago

What is the potential energy of a molecule?

inysia [295]

Answer:

D) Energy stored in molecular bonds

Explanation:

Hope this helps you

5 0

4 years ago

A major cause of biodiversity loss and species extinction in North Caroline is due to the introduction of invasive non-native sp

aleksley [76]

Answer:

The option D) increases reproduction of native species is NOT an impact that an invasive non-native species has on an ecosystem.

Explanation:

Introduction of a non-native species into a stable ecosystem can be very threatful to the ecosystem. The non-native species will compete for resources with the native species of the area. As a result, there will be severe competition. The competition might lead to migration of the native species or them being endangered on the whole. Also, the introduction of a non-native species will result in the extinction of a particular prey as it will have an increase in the number of predators.

6 0

3 years ago