Which statement correctly compares an atom of an alkali metal with an atom of the alkaline earth metal next to it on the periodic table?The alkali metal atom forms a +1 ion, while the alkaline earth metal atom forms a +2 ion.
The alkali metal atom forms a +2 ion, while the alkaline earth metal atom forms a +1 ion.
The alkali metal atom has one less shell of electrons than the atom of the alkaline earth metal.
The alkali metal atom has one more shell of electrons than the atom of the alkaline earth metal.
Answers
Answer: The alkali metal atom forms a +1 ion, while the alkaline earth metal atom forms a +2 ion.
Explanation: Group 1 elements are called as alkali metals and group 2 elements are called as alkaline earth metals.
For example, Li is an alkali metal and Be is an alkaline earth metal.
Lithium(Li) has an atomic number of 3 and the electronic configuration is:
Li:
Thus lithium has to lose 1 electron and acquire 1+ charge to attain nearest noble gas configuration.
Berrylium(Be) has an atomic number of 4 and the electronic configuration is:
Be:
Thus berrylium has to lose 2 electrons and acquire 2+ charge to attain nearest noble gas configuration.
Answer:
a
Explanation:
Related Questions
Example of transforming from electric energy to MAGNETICAL energyPLZZ
What is the affect of increasing the water's mass?how does it reflect it's temperature?
What kind of elements form covalent bonds?
Forces and Motion:Question 2A student pushes a box to slide it across the floor. Which statement best explains why the box beginsto move?Select one:0 The weight of the box is less than the force of friction.OThe weight of the box is greater than the force of friction.The applied force is greater than the force of friction.OThe applied force is less than the force of friction
Answers
10.1 g ------------ 100 g ( H₂O )
? g ------------- 100 g ( H₂O )
Mass of KClO₃ :
100 * 10.1 / 100
1010 / 100 = 10.1 g of KClO₃
hope this helps!
Answers
* The clothes drying on the Clothesline, the river that evaporates, a puddle of water that dry, etc.
hope this helps!
Answers
The symbol of an isotope that atom of its element contains 50 electrons and 70 neutrons is Tin (Sn).
What is Isotope?
The Isotope may be characterized as one of two or more types of atoms of a chemical element that significantly have the same number of protons but with different numbers of neutrons and therefore different atomic masses.
In a more simple sense, an isotope may be defined as an atom that has the same atomic number but different atomic mass and physical properties.
According to the question,
The number of electrons an atom possesses = 50.
The number of neutrons = 70.
Since, the number of electrons = the number of protons = the atomic mass of an atom = 50.
∴ According to the periodic table, an element having an atomic number of 50 is known as Tin (Sn).
Its atomic mass = the number of protons + the number of neutrons.
= 50 + 70 = 120 amu.
Therefore, the symbol of an isotope that the atom of its element contains 50 electrons and 70 neutrons is Tin (Sn).
To learn more about Isotopes, refer to the link:
#SPJ2
Answers
Answer:
The answer is below
Explanation:
1. With the aid of natural hues, the fox can change its color based on the environment it found itself in. For example, during summer and spring, fox color changes to dark to provide itself cover in the environment that is characterized by the brown dirt. Similarly, the fox color changes to white during winter and fall to blend with the snow.
2. In a bid to domesticate fox, it has been observed over many generations that the domesticated fox compared to wild fox has floppy ears and curly tails. The stress hormone level has reduced significantly and they possess a smaller adrenal gland.
Answers
(3) unstable nuclei emit alpha particles
(4) unstable nuclei emit beta particles
Answers
The unstable nuclei emit beta particles.
What is unstable nuclei?
An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom's nucleus may result from an excess of either neutrons or protons.
What is beta particle?
- An unstable nucleus can emit a fast-moving electron called a beta particle, to become more stable.
- Beta radiation is made up of a stream of beta particles emitted from unstable nuclei.
- Beta radiation is normally emitted from unstable nuclei in which the number of neutrons is much larger than the number of protons.
- A beta particle has a relative mass that can be considered to be zero, so its mass number is zero, and as the beta particle is an electron, it can be written as ⁰₋₁e. It can also be written as ⁰₋₁β.
Atoms of I-131 spontaneously decay when the unstable nuclei emit beta particles.
The unstable nuclei undergo spontaneous decay by emitting radiations to attain stability. Stability of isotopes is based on the ratio of neutrons and protons in its nucleus. Although most nuclei are stable, some are unstable and spontaneously decay, emitting radiation.
Hence, option 4 is the answer.
To learn more about beta decay here
#SPJ2
Answer;
(4) unstable nuclei emit beta particles
Atoms of I-131 spontaneously decay when the unstable nuclei emit beta particles.
Explanation;
-Unstable nuclides undergo spontaneous change or the spontaneous decay by emitting radiations to attain stability. Stability of isotopes is based on the ratio of neutrons and protons in its nucleus. Although most nuclei are stable, some areunstable and spontaneously decay, emitting radiation.