What are the 4 properties of the atom?
- Typical sizes of atom and nucleus.
- Most of atom’s mass is in the nucleus.
- Constituents: protons, neutrons, electrons.
- Electric force holds atom together.
- Nuclear force holds nucleus together.
- Atoms, ions.
- Atomic number.
What are three examples of properties?
These properties include color, density, melting point, boiling point, and thermal and electrical conductivity. While some of these properties are due chiefly to the electronic structure of the element, others are more closely related to properties of the nucleus, e.g., mass number.
What are the two substances mentioned in the poem?
The two substances mentioned in thepoem is element and compound.
Which describes a property of all elements?
Properties of an element are sometimes classed as either chemical or physical. Some properties of an element can be observed only in a collection of atoms or molecules of the element. These properties include color, density, melting point, boiling point, and thermal and electrical conductivity.
What are 3 types of chemical properties?
Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion. Iron, for example, combines with oxygen in the presence of water to form rust; chromium does not oxidize (Figure 2).
How do you identify a chemical property?
Chemical Property Examples Chemical properties can only be established by changing a substance’s chemical identity, and are different from physical properties, which can be observed by viewing or touching a sample. The internal qualities of a substance must be altered to determine its chemical properties.
What are the 10 chemical properties?
Here are some examples of chemical properties:
- Reactivity with other chemicals.
- Toxicity.
- Coordination number.
- Flammability.
- Enthalpy of formation.
- Heat of combustion.
- Oxidation states.
- Chemical stability.
Is color change a physical or chemical property?
Color. The changing of color of a substance is not necessarily an indicator of a chemical change. For example, changing the color of a metal does not change its physical properties. However, in a chemical reaction, a color change is usually an indicator that a reaction is occurring.
How can properties be used to identify elements?
Each element has unique physical properties such as density, melting point, boiling point, etc. These properties can be used to identify an element using a reference book that contains such information about each element. Flame tests, atomic spectra, and spectroscopy can be used to identify some elements.
What is produced when two atoms combined?
A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds. When two hydrogen atoms combine with one oxygen atom, it becomes the compound water.
What elements have similar properties?
Elements in the same group of the periodic table have similar chemical properties. Elements can be classified as metals, metalloids, and nonmetals, or as a main-group elements, transition metals, and inner transition metals.
What element is most similar to oxygen?
Explanation: Oxygen is in group 16/VIA, which is called the chalcogens, and members of the same group have similar properties. Sulfur and selenium are the next two elements in the group, and they react with hydrogen gas (H2) in a manner similar to oxygen.
What elements have properties similar to hydrogen?
Nonmetal
Which two elements have properties that are the most similar?
Which element have the most similar chemical properties?
- Chemistry Tutoring Regents in NYC.
- Which two elements have the most similar chemical properties?
- (1) beryllium and magnesium.
- (2) hydrogen and helium.
- (3) phosphorus and sulfur.
- Answer: The correct answer 1: beryllium and magnesium.
Which is the most active nonmetal?
Chlorine
Which element in Group 17 is the most active nonmetal?
FLUORINE
Which element below is least reactive?
Noble gases
Is oxygen a reactive element?
Oxygen is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element. Free oxygen is too chemically reactive to appear on Earth without the photosynthetic action of living organisms, which use the energy of sunlight to produce elemental oxygen from water.
Which elements are more reactive?
Reactivity Trend in the Periodic Table
- The most reactive element is fluorine, the first element in the halogen group.
- The most reactive metal is francium, the last alkali metal (and most expensive element).
- The least reactive elements are the noble gases.
What metal is the least reactive?
The metals designated as the transition metals in the periodic table are much less reactive, and metals such as gold and platinum prop up the bottom of the series, exhibiting little in the way of chemical reaction with any everyday reagents.
Are the least reactive metals the cheapest?
The most reactive metal is Potassium (K) and the least reactive metal is Gold (Au). As you can see, least-reactive metals are not necessarily the cheapest. In the reactivity series, copper, gold, and silver are at the bottom and hence are least reactive.
How can you tell which metal is more reactive?
The elements toward the bottom left corner of the periodic table are the metals that are the most active in the sense of being the most reactive. Lithium, sodium, and potassium all react with water, for example.
Which metal is most reactive with oxygen?
Oxygen is very reactive with Alkali metals. Alkali metals are given the name alkali because the oxides of these metals react with water to form a metal hydroxide that is basic or alkaline. Lithium produces an oxide, sodium produces a peroxide, and potassium, cesium, and rubidium produce superoxides.
Which metal is the least reactive with oxygen?
platinum
Is Potassium the most reactive metal?
The alkali metals, Group 1A, are the most reactive metals because they have one valence or outer electron. This makes Francium the most reactive, followed by cesium, rubidium, potassium.
What will increase the order of reactivity of oxygen?
Metals in the reactivity series from aluminium to copper react with oxygen in the air to form the metal oxide. Aluminium is the fastest and copper is the slowest of the six. Silver, gold and platinum do not react with oxygen in the air.