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Crank
3 years ago
13

Typically, alkali metals tend to have

Chemistry
1 answer:
vladimir2022 [97]3 years ago
5 0

Answer:

d

Explanation:

hmmmmmmmmmmmmmmmm

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How many valence electrons are represented in the following electron configuration? 1s22s22p5
Alex
Answer is: d) 7.
Electron configuration: 1s²2s²2p⁵.
<span>Valence electrons are in 2s and 2p orbitals.
</span>Valence electrons<span> are outer shell </span>electrons (transition metal can have a valence electrons in an inner shell) <span>that is associated with an </span>atom <span>and they can form </span>chemical bond. V<span>alence eletrons determine chemical proporties of element.</span>
7 0
3 years ago
Many classic experiments have given us indirect evidence of the nature of the atom. Which of the experiments listed below did no
uranmaximum [27]

Answer:

Option A, The Rutherford experiment proved the Thomson "plum-pudding" model of the atom to be essentially correct.

Explanation:

Thomson's plum pudding model:

Plum pudding model was proposed by J.J Thomson. In Thomson's model, atoms are proposed as sea of positively charge in which electrons are distributed through out.

Result of Rutherford experiment:

As per Rutherford's experiment:

Most of the space inside the atom is empty.

Positively charge of the atom are concentrated in the centre of the atom known as nucleus.

Electrons are present outside the nucleus and revolve around it.

As it is clear that, result of Rutherford experiment did not supported the Thomson model.

4 0
3 years ago
Which of the following is an example of a PHYSICAL change?
Nezavi [6.7K]

Rust on a nail is a chemical change.

Ice melting IS a physical change. Ice is made of water, when you melt ice its still water. Just in a different physical state.

3 0
3 years ago
What is relative mass of an atom
kow [346]

Answer:

Explanation:

The relative atomic mass of an element is a weighted average of the masses of the atoms of the isotopes - because if there is much more of one isotope then that will influence the average mass much more than the less abundant isotope will.

8 0
2 years ago
Types of Organisms:
maxonik [38]

Answer:

Part A

The green plant is a producer

The grasshopper is a herbivore

The Rat is a Omnivore

The snake is a Carnivore

The eagle is a Carnivore

The mushroom is a Decomposer

Part B

The arrow between each organism indicates the direction of energy flow which shows the direction in which the energy transfer takes place from one organism to the next, with the general source of energy for all animals being the Sun.

Part C

A sample food chain can be presented as follows;

Sun, Green plants → worms → Frogs → Snakes → Coyotes → Bears → Tigers → Mushroom → Plants

Explanation:

6 0
3 years ago
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