QUESTION 8 Which is true regarding Sr? The atoms lose 2 electrons to form a +2 ion The atoms lose 2 electrons to form a -2 ion The atoms gain 2 electrons to form a +2 ion The atoms gain 2 electrons to form a-2 ion QUESTION 9 Which is true regarding Se? The atoms lose 2 electrons to form a +2 ion The atoms lose 2 electrons to form a -ion The atoms gain 2 electrons to form a +2 ion The atoms gain 2 electrons to form a -2 ion OUESTION 10

Q: Which scenario would cause a covalent bond to form?

A: Given : covalent bond is formed Tip : by sharing of electron covalent bond forms.

Q: How many protons and electrons are present in the oxide ion? D 8 protons and 8 electrons 10 protons…

A: For a neutral atom,Atomic number = No. of protonsNo. of protons = No. of electrons

Q: How many electrons will the following elements gain or lose when they form ions? Use the dropdown on…

A: All elements are try to get stable electronic configuration as noble gas or complete it's octet.…

Q: Based on the Activity Series of the metal elements, which element in the following pair will be more…

A: In the activity series of non-metals, elements higher on the list are more reactive and more likely…

Q: How many electrons will bromine gain or lose when it forms an ion? loss of 1 electron loss of 2…

A: • When an atoms gains an electron it forms anion (negatively charged).A + e- -----> A-• When an…

Q: Which one of the atoms shown would be most likely to form a cation with a charge of +1?

A: Electrons are filled in a different atomic orbital in an atom. According to the Aufbau rule, the…

Q: ges saved 14. Determining whether the formation of an ionic compound is endothermic or exothermic…

A: arium chloride is formed by the reaction of Ba and chlorine

Q: The number of valence electrons found in an atom of a Group A element is equal to     eight.…

A: The number of valence electrons found in an atom of a Group A element is equal to

Q: What is the molecular 5. If a polyatomic ion has one more electron than the sum of its valence…

A: Step 1:Total valence electrons of poly atomic ions = sum of valence electrons of all elements +…

Q: The chemical formula when Cr(II) combines with CO3² Express your answer as a chemical formula.

A: A chemical formula indicates the elements and their proportions in a compound.According to question,…

Q: Based on their locations the periodic table, which two elements would you expect to form positive…

A: Boron and aluminum are the two elements which form ions of +3 charge.

Q: How much energy (kJ) is required to remove all the 5s electrons in 8.78 g of strontium (Sr)? State…

A: The question is based on the concept of ionization energy. it is defined as the amount of energy…

Q: Which of the following elements is an halogen?

A: The elements which belong to the 17th group of the modern periodic table are called halogens. The…

Q: Which of the following does NOT describe a metal? O good conductor of electricity O found on the…

A: Metals are solids at Room temperature except liquid mercury(Hg) These are having high melting point…

Q: Decide which element probably forms a compound with oxygen that has a chemical formula most and…

A:

Q: Use the periodic table to answer the question. Aluminum (AI) reacts with chlorine (Cl2) gas to form…

A: Correct answer is (C) +3. Balanced chemical equation: 2 Al + 3 Cl2  -------->  2 AlCl3  Al has 3…

Q: Rubidium (Rb) reacts with oxygen gas (O) to form a stable compound. In this compound, what is the…

A: The elements present in group 1 of periodic table are called Alkali metals  The Alkali metals are…

Q: For the following compounds, state whether it is ionic or covalent. If it is ionic, write the…

A: If the molecule is made up of two elements and one of them is metal (i.e. element belongs to group 1…

Q: Which of the following elements is stable? O Sodium in group 1 Aluminum in Group 13 O Chlorine in…

A: Argon in group 18

Q: Covalent bonding occurs when pick the best options

A: Concept of covalent bonding.

Q: How many core electrons does nickel contain? O 26 O 18 O 2

A: How many core electron in Nickel ?

Q: Fill in the name and empirical formula of each ionic compound that could be formed from the ions in…

A:

Q: For the element manganese (Mn), select the charge(s) Mn ions will prefer. Hint: write the electron…

A: To solve this problem first we have to write the electronic configuration of Mn .

Q: When are anions formed?   When non-metals lose electrons   When metals lose electrons   When…

A: Anion formed when specie wants to get stablize by gaining electrons. ->Hence, anion formed by…

Q: Give the name of the compound formed when Ca and I atoms combine.

A: Ca + I2 ---> CaI2 So, the compound formed when Ca and I atoms combined is Calcium iodide.

Q: Give the number of valance and core electrons for each. Valence electrons are from the group number.…

A: Number of electrons lies in the outermost shell of the atom is known as valence electrons and they…

Q: MgS. 7H₂O is an example of a hydrate. What is the chemical name of this hydrate? 2 magnesium sulfide…

A: Given -> MgS.7H2O

Q: Question 33 How are ions formed from atoms? Atoms either lose electrons, forming ions with positive…

A: Ion is any atom or group of atoms that bears positive or negative charges. The ion with positive…

Q: Barium becomes a(n) A. cation, Ba+2 B. cation, Ba² C. D. anion, Ba+2 anion, Ba-² when it loses two…

A: After loosing two electron barium become cation and will form Ba+2

Q: 9 -.. 2 Question 23 4 Listen A compound contains an unknown ion X and has the formula XCl₂. Ion X…

A: Cations are formed by losing electrons while anions are formed by gaining electrons

Q: Decide which element probably forms a compound with chlorine that has a chemical formula most and…

A: The chlorine and aluminum formed a compound which has chemical formula AlCl3 Aluminum belongs to the…

Q: QUESTION 11 How is Na attached to the other atoms in NaHCO3 (sodium bicarbonate)? O Shared electrons…

A:

Q: Atomic mass Atomic number- 12 6 16 15 How many electrons will a single atom of sulfur with no charge…

A: Given, Valence electrons are the outermost electrons which, therefore, are located on the highest…

Q: Which element is NOT a main group element?   Question 3 options:   Ca…

A: Main group elements are those elements that are found in the s and p blocks of the periodic table.…

Atomic Structure

The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.

Shape of the D Orbital

Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.