According to the periodic table of the elements, which set of elements has similar properties?A. H,C,I
B. He, H, Al
C. He, Ne, Ar
D. Na, Ca, Al
Answers
Set of elements which has similar properties is helium,neon,argon.
What are periodic trends in a periodic table?
Elements in the periodic table are arranged according to their atomic numbers according to modern periodic law which states that properties of elements are a periodic function of their atomic numbers.
In a group, elements have same number of valence electrons as for every element in a group a new shell is added and hence number of valence electrons remain same. In a period, electrons are added to same shell for every element present in the same period,because of which valence electrons do not remain same.
Valence electrons take part in chemical reactions and as they are same for elements present in the same group they have similar properties while for elements present in a period since they have different number of valence electrons they differ in properties.
Learn more about periodic trends ,here:
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Out of this list: He, Ne and Ar are all group 18 elements (Noble gases)
Therefore they have similar chemical properties.
Related Questions
Which of the following is an example of a mixture? Option 1: Pure water Option 2: The air in your room Option 3: Gold Option 4: All of the above
The solid and liquid phases of water can exist ina state of equilibrium at 1 atmosphere of pressureand a temperature of(1) 0°C (3) 273°C(2) 100°C (4) 373°C
The distance between stars is typically measured in
Helpppp pleaseee for 15 points
Answers
Answer:Some examples of the force of gravity include;
-The force that holds the gases in the sun.
-he force that causes a ball you throw in the air to come down again.
-The force that causes a glass you drop to fall to the floor.
-The force that keeps the Earth and all of the planets in line in the proper position in their orbits around the sun.
-The force that causes an apple to fall downward from an apple tree.
-he force that keeps you walking on Earth instead of floating away into space.
Answers
Answer:
Rubidium (Rb)
Explanation:
Ionization Energy is defined as, "the minimum energy required to knock out or remove the valence electron from valence shell of an atom".
Trends in Periodic table:
Along Periods:
Ionization Energy increases from left to right along the periods because moving from left to right in the same period the number of protons (atomic number) increases but the number of shells remain constant hence, resulting in strong nuclear interactions and electrons are more attracted to nucleus hence, requires more energy to knock them out.
Along Groups:
Ionization energy decreases from top to bottom along the groups because the number of shells increases and the distance between nucleus and valence electrons also increases along with increase in shielding effect provided by core electrons. Therefore, the valence electrons experience less nuclear attraction and are easily removed.
Conclusion:
Given elements belong to same group hence, Rubidium present at the bottom of remaining elements will have least ionization energy due to facts explained in trends of groups above.
Answers
Having 17 neutrons (not even to the # of protons) would result in a radioactive isotope. An isotope is when the neutrons in the nucleus aren't equivalent to the protons.
The symbol of radionuclide would be : An isotope
We know that a radioactive nuclide is used to detect eye tumors. An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons.
The answer is isotope. Atoms that have the same number of protons but different numbers of neutrons are called isotopes.
Answers
Answer:
behavioral observation scale
Explanation:
According to my research on different methods for providing feedback, I can say that based on the information provided within the question Joseph should use a behavioral observation scale. This feedback method measures the level of performance and frequency of certain behaviors. In this situation this feedback method would be the easiest and most accurate method of providing feedback.
**Even though no answer choices were provided this method is the most used in these types of situations.**
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
Answers
Answers
Answer: The Sun is present in the center of solar system whose features are color, mass and texture.
Explanation:
Our solar system consists of one star and 8 planets. The star is present in our solar system is the Sun and due to this star only, our solar system is named as such.
The planets present in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
These planets revolve around the star which is present at the center of the solar system.
Three physical features of Sun are:
- Color: The color of Sun is yellow.
- Mass: The mass of the Sun is
- Texture: Due to the convectional currents, the texture of the whole surface of sun is granular.
Hence, the Sun is present in the center of solar system whose features are color, mass and texture.