Why is Hydrogen (H) different from other elements in group 1 (alkali metals)?
(1 point)
Responses
[It is the most reactive element in the alkali metals]
[It is the most reactive element in the alkali metals]
[It is a very heavy element, and the alkali metals are relatively light]
[It is a very heavy element, and the alkali metals are relatively light]
[It is not a metal, it is a non-metal]
[It is not a metal, it is a non-metal]
[There are no valence electrons for Hydrogen (H) but the rest of the alkali metals have 1 valence electron.]
[It is not a metal, it is a non-metal]
explain why your right
Hydrogen is different from the other elements in group 1 (alkali metals) because it is not a metal, whereas the rest of the alkali metals are. Metals generally have certain characteristics, such as being shiny, malleable, and good conductors of electricity and heat. On the other hand, hydrogen is a non-metal, which means it lacks these typical metallic properties.
Additionally, the alkali metals in group 1 all have one valence electron in their outermost energy level, while hydrogen does not have any valence electrons. Valence electrons are the outermost electrons of an atom that are involved in chemical reactions. Having one valence electron makes the alkali metals highly reactive.
Therefore, since hydrogen is not a metal and does not have any valence electrons, it is different from the other elements in group 1, which are alkali metals.
Which two statements about metals and non-metals are correct?
(2 points)
Responses
Non-metals can be hammered into thin sheets
Non-metals can be hammered into thin sheets
Metals burn orange
Metals burn orange
Non-metals are brittle
Non-metals are brittle
Metal can be hammered into thin sheets
Two correct statements about metals and non-metals are:
1. Metals can be hammered into thin sheets.
2. Non-metals are brittle.
Which element has two valence electrons?
(1 point)
Responses
Calcium (Ca), Element 20
Calcium (Ca), Element 20
Fluorine (F), Element 9
Fluorine (F), Element 9
Carbon (C), Element 6
Carbon (C), Element 6
Sulfur (S), Element 16
Calcium (Ca), Element 20
Cesium (Cs, Element 55) has LESS valence electrons than Sulfur (S, Element 16).
However, Cesium (Cs) still is a higher energy level than Sulfur (S)?
(1 point)
Responses
True
True
False
AND EXPLAIN WHY YOUR RIGHT
False.
Cesium (Cs) does not have fewer valence electrons than Sulfur (S). Valence electrons are the electrons in the outermost energy level of an atom, and they are responsible for the chemical behavior of an element. Cesium, as an alkali metal in group 1, has only one valence electron. On the other hand, Sulfur, as a non-metal in group 16, has six valence electrons. Therefore, Sulfur has more valence electrons than Cesium.
Additionally, the energy level of an atom is determined by the arrangement of its electrons. In general, as you move down a group on the periodic table, the energy level of the elements increases. Cesium is located in Period 6 and Sulfur is located in Period 3. Since Cesium is in a higher period, it has a higher energy level than Sulfur.
Overall, Cesium has fewer valence electrons but a higher energy level compared to Sulfur. Therefore, the statement "Cesium (Cs) still is a higher energy level than Sulfur (S)" is false.
Explain, in your own words, why Noble Gases (the last family on the periodic table)
are the happiest atoms? In other words, why are they the least reactive elements on the periodic table?