Question
The oble gases 1 a Arrange these elements into a table showing metals and non-metals; phosphorus, P, barium Ba, vanadium, V. mercury, Hg, krypton, Kr,potassium, K, and uranium, U. [2 marks] b Would you classify hydrogen as a metal or a non-metal? Explain why. [1 mark] 2 Explain why when you mix two elements together you can often separate them quite easily by physical means.yet when two elements are chemically combined in a compound they are usually difficult to separate. [2 marks] 3 Draw diagrams to explain the difference between an element and a compound. [2 marks] 4 Describe the basic structure of an atom. [2 marks] 5 Find out the Latin words from which the symbols of the following metallic elements are derived: [1 mark] a sodium, Na [1 mark] b gold, Au [1 mark] c lead, Pb [1 mark] d potassium, K. 6 Explain what information can be deduced from the chemical formula of carbon dioxide, CO_(2) [2 marks] Topi
Answer
4.1
(313 Votes)
Leonie
Professional · Tutor for 6 years
Answer
1 a Metals : Barium (Ba), Vanadium (V), Mercury (Hg), Potassium (K), Uranium (U)Non-metals : Phosphorus (P), Krypton (Kr)b Hydrogen is considered as a non-metal due to most of its properties are same as non-metals.2 If we mix two elements together, but there won't be a chemical reaction happened among the elements, so we can easily separate them through physical methods. However, if the elements chemically react together to form a compound, they will become difficult to separate because chemical bonds are formed between the atoms.3 Element: refers to pure substances made up of atoms whereas a compound is a combination of two or more elements.4 An atom comprises a nucleus (made up of protons and neutrons) and an orbit (made up of electrons). Protons are positive charge holder while electron acquire negative charge and neutron has no like and different reside within nucleus appearance.5 a Latin name for sodium : Natrium (Na), b latin name for gold : Aurum (Au), clatin name for lead : Plumbum (Pb), d latin name for potassium : Kalium (K).6 From the formula for carbon dioxide,
, we can say that each molecule of carbon dioxide contains 1 atom of carbon (C) and 2 atoms of oxygen (O2).
Explanation
## Step1: First, we classify the elements into metals and non-metals. Elements are grouped into metals and non-metals based on their properties. Typically, metals are hard, conduct electricity and heat, are malleable, and ductile. Elements that are not metals are called nonmetals. Non-metals are not good conductors of heat and electricity. Some common non-metallic elements include sulfur(SK), krypton, and phosphorus.###
###
## Step2: Hydrogen is generally considered a non-metal due to its properties although it is placed above the metals in the periodic table. It lacks most of the typical metal characteristics, suggesting a classed as a `non-metal`.## Step3:We can mix elements together easily by physical means and also separate them because no new matter has formed in the environment. Heating, for example, is only trivial to utilise which aiding mixing together. For a compound, atoms chemically band to each other, convert into a new matter through strong bonding. Breaking it however gets need to cut all bonds translates to external source of energy, thereby complicates upon the process.## Step4:At the center of an atom, there is a nucleus consisting of `Protons` (positively charged particles) and `Neutrons` (particles with no charge). `Electrons`(negatively charged particles) revolve around the nucleus in distinct energy levels or shells.## Step5:We lookup the metallic elements, their Latin names, and symbols:### \( \textit{Ionic (Latin) Names: } \)
### \( \textit{Modern (English) Names: } \)
## Step6:Chemical Formula of
-(Carbon Di-oxide): In a molecule of carbon dioxide, there is 1 atom of carbon denoted by C and 2 atoms of oxygen as shown by O. Hence representing molecular composition.