All categories

3 years ago

Can someone help me...........................

Chemistry

2 answers:

gtnhenbr [62]3 years ago

8 0

Answer:

part of a large collection of energy called the electromagnetic radiation spectrum. Solar radiation includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays.

Explanation:

if this is wrong please forgive me

ella [17]3 years ago

5 0

Answer:

The sun gives off heat energy.

Explanation:

The sun gives off heat for us to survive, for the plants to grow, and for us to play around in the grass

You might be interested in

ANSWER THESE QUESTIONS PLEASE No spam!! :/

VladimirAG [237]

Answer:

By definition, a pure substance or a homogeneous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases. When oil and water are combined, they do not mix evenly, but instead form two separate layers.

Explanation:

Sorry only knew the answer to the first question

8 0

3 years ago

Read 2 more answers

What determines the atomic number of an atom?. . A.. the number of neutrons in two atoms of an element. . B.. the number of elec

WINSTONCH [101]

The number of protons in every atom of an element determines the atomic number of an atom. Short after Rutherford made the gold foil experiment, the British scientist Henry Mosely discovered that the atoms of every element have a unique positive charge in their nuclei. This positive charge is the number of protons and is called atomic number. So, the atomic number identifies every different element.

6 0

3 years ago

What is the name for the process of recycling materials that make up the earths crust and mantle

Step2247 [10]

The answer is the rock cycle

4 0

3 years ago

Read 2 more answers

Which of the following lists objects in order from smallest to largest?

lyudmila [28]

Answer:

C. Moon, Earth, Jupiter, Sun

Explanation:

Well, the moon is smaller than the Earth so, C is the only logical explanation

8 0

2 years ago

Read the given expression. X = number of protons − number of core electrons Which of the following explains the identity of X an

shepuryov [24]

Answer: The correct statement is X is the effective nuclear charge, and it increases across a period.

Explanation:

We are given that:

X = number of protons − number of core electrons

Effective nuclear charge is defined as the actual nuclear charge (Z = number of protons) minus the screening effect caused by the electrons present between nucleus and valence electrons. These electrons are the core electrons.

The formula used for the calculation of effective nuclear charge given by Slater is:

$Z^*=Z-\sigma$

where,

$Z^*$ = effective nuclear charge

Z = atomic number or actual nuclear charge or number of protons

$\sigma$ = Screening constant

The effective nuclear charge increases as we go from left to right in a period because nuclear charge increases with no effective increase in screening constant.

Hence, the correct answer is X is the effective nuclear charge, and it increases across a period.

5 0

4 years ago