Script of teacher and student dialogue
Learning with a scientific approach is a learning that consists of observing activities (to identify things you want to know), formulating questions (and formulating hypotheses), trying / collecting data (information) with various techniques, associating / analyzing / processing data (information) And draw conclusions and communicate results consisting of conclusions to acquire knowledge, skills and attitudes. These steps can be followed by creating activities. Teacher : Good morning my student Student : Good morning too, sir Teacher : Now, I will explain about Atomic structure. The atom consists of protons, neutrons and electrons. The nucleus of atoms is composed of a number of protons and neutrons. The number of protons in the atomic nucleus determines the charge of the nucleus, while the nucleus of the nucleus is determined by the number ...
Why does air not have a definite formula?
BalasHapus
HapusIt is a mixture of many gases. Only elements and pure compounds have formulas.
OK.
Why the parts of a compound are present in specific ratio?
BalasHapusbecause compund have their own formula,With Spesific ratio,As A comparison is compound with CH empiric formula, Can be C2h2,Or C3H3 formula, But C2H2 and C3H3 is completely different,So to make itss different need a specifict ratio like C3H3 or C2H2
HapusCould u give me some examples for the same type atom?
BalasHapusim sorry hudia,Glad to answer your question but,I dont get your question,Same type of atoms?,Did you mean Like N2 or H2 or O2,or same type of the atoms also called isotop isobar and isoton
HapusPlease explain how positive ions and negative ions are formed
BalasHapusFor example, common table salt is sodium chloride. When sodium (Na) and chlorine (Cl) are combined, the sodium atoms each lose an electron, forming cations (Na+), and the chlorine atoms each gain an electron to form anions (Cl−). These ions are then attracted to each other in a 1:1 ratio to form sodium chloride (NaCl).
HapusNa + Cl → Na+ + Cl− → NaCl
How do I find the number of protons, electrons and neutrons that are in an atom of an element?
BalasHapusproton is atomic number,Electrons have same number with protons in netral condition,and number of neutrons is Atomic mass - numbers of proton
HapusWhat should be considered to determine the element, whether gas-shaped, solid or liquid.?
BalasHapusKnown elements exist in the form of metals, not metals (non-metals), and semilogam. Metals are elements that have shiny properties and are generally good conductor of electricity and heat conductor. Metal elements are generally solid at normal temperatures and pressures, except for mercury in the form of liquid. In general, metal elements can be forged so that can be formed into other objects. Some of the metal elements are iron,
HapusGold, silver, platinum, and copper. Examples of metal elements are shown in the following table.
What are the mixed types ?
BalasHapusA. Homogeneous mixture
HapusSugar dissolved into water will dissolve completely and evenly on each part of the water so that sugar no longer visible form.
Such mixtures are called homogeneous mixtures. In homogeneous mixtures, the substances that compose them can not be observed directly.
Examples of other homogeneous mixtures are syrup (mixture of sugar, dye, and water), oralit solution, air (mixture of gases), and brine.
Definition of Mixed, Mixed Examples and Miscellaneous Mixed Types
Image: Example of Homogeneous Mixture (Syrup) and Heterogeneous (Coffee)
B. Heterogeneous mixture
Have you ever made a cup of coffee? Notice the water properties of the coffee! The coffee dissolved into the water was dissolved, but after a short period of time there will be coffee deposition.
Such mixtures are called heterogeneous mixtures. In a heterogeneous mixture, the substances that compose them can be observed directly.
An example of other heterogeneous mixtures is a mixture of water and soil, a mixture of water and oil, a mixture of sugars and salt, a mixture of water and lime, and the like.
BalasHapusAtom is the smallest part that can not be separated again, why is that?
Because Atom is the smallest part of an element that can not be divided again and has the same properties with other elements
HapusWhy is H2O reffered to as element?
BalasHapusBecause H2o is one of the elements in the periodic table
HapusIn your opinion, a compounds can be changes to an atom?
BalasHapusyes,it does,because a compounds composed one or more atom,so if a compounds can be changed to atom
Hapuswhat about coloid? is mixture or not?
BalasHapusColloids are a mixture of heterogeneous substances (two phases) between two or more substances in which the colloidal particles of matter (dispersed / dispersed phases) are spread evenly in other substances (dispersing medium / breaker). Among the homogeneous and heterogeneous mixtures there is a colloidal mixing system, or it can also be called a homogeneous phase (phase) switch into a heterogeneous one. The homogeneous mixture is a mixture having the same properties on each part of the mixture, for example sugar and rain solution. While the heterogeneous mixture itself is a mixture of unequal properties on each part of the mixture, for example water and oil, then sand and cement.
Hapus