Simple Quiz On Atomic Structure

In the periodic table, groups are the columns while periods are the rows.

Isotopes have the same number of electrons, which means they have the same electron configuration. This electron configuration determines the chemical properties of an element. Therefore, isotopes have the same chemical properties. The other options, melting point, boiling point, and density, are not solely determined by the number of electrons and can vary between isotopes.

Both ions of the elements have the 3+ charge.

All noble gases are unreactive.

The p-orbital is shaped like a dumbbell, with two lobes on either side of the nucleus. This shape is a result of the wave-like nature of electrons and their probability distribution within the orbital. The dumbbell shape allows for the electron to move in different directions and orientations around the nucleus.

Particles, ions, or atoms that have the same number of electrons are isoelectronic. Isoelectronic species have the same electronic configuration, meaning they have the same number of electrons and therefore similar chemical properties. The number of protons and neutrons in an atom does not determine whether they are isoelectronic, as it is the number of electrons that primarily determines the element's behavior in chemical reactions.

Aufbau's Principle is a fundamental principle in chemistry that describes the order in which electrons fill the orbitals of an atom. According to this principle, electrons in their ground state will occupy orbitals in order of their energy level, with the lowest energy levels being filled first. This means that electrons will fill the orbitals starting from the lowest energy level and moving up to higher energy levels. This principle helps to explain the organization of the periodic table and the electron configuration of atoms.

A stable electronic configuration has a completely filled outermost principal quantum shell.

Diamond is a form of carbon in which each carbon atom is covalently bonded to four other carbon atoms. This results in a three-dimensional network structure, giving diamond its hardness and unique properties. The covalent bonds are strong and stable, making diamond one of the hardest substances known. Therefore, the correct combination for diamond is "covalent bond, 4 atoms joined to each carbon atom."

As you move from left to right across a period in the periodic table, the elements tend to change from being metals to non-metals. This is because the properties of elements are determined by their electron configurations, and as you move across a period, the number of valence electrons increases. Metals tend to have fewer valence electrons and non-metals tend to have more valence electrons. Therefore, as you move from left to right across a period, the elements transition from having metallic properties to having non-metallic properties.

Alternatively, they have the same atomic number but different mass number.

Fluoride would displace chloride in an equation because it is in a higher period of group VII, making it more reactive.

n=2 is the second principal quantum shell. It is made up of an s orbital and p orbital which can store 2 and 6 electrons respectively. 2+6=8

According to Fleming's left-hand rule, if the first finger represents the direction of the magnetic field and the second finger represents the direction of the current, then the thumb represents the direction of the resultant force. This means that the correct answer is "Direction of resultant force." The rule is commonly used to determine the direction of the force experienced by a current-carrying conductor in a magnetic field.

let x = relative abundance of cu 63

63(x/100) + 65(1-x/100) = 63.6
x=70
Relative abundance of Cu 65 = 100-70
=30

An ionic compound is formed.

A half filled d sub shell has extra stability.

Graphite is a form of carbon that has a layered structure, with weak bonds between the layers. This structure gives graphite its soft and slippery texture, making it suitable for use as a lubricant. However, graphite also has a high melting point, which means it requires a significant amount of heat to change from a solid to a liquid state. This property makes graphite useful in high-temperature applications, such as in the production of crucibles and refractory materials. Therefore, the correct answer is "Soft, high melting point."

Allotropes are different forms of the same element that exhibit distinct physical and chemical properties. Despite their differences, allotropes share some common characteristics due to their elemental composition. Therefore, they are of the same element and have similar properties.

Francium has a lower melting point than potassium because as you move down Group I of the periodic table, the melting points of the elements decrease. This is due to the increase in atomic size and the weakening of metallic bonds. Francium, being below potassium in the group, has a larger atomic size and weaker metallic bonds, resulting in a lower melting point compared to potassium.