Which of these forces determines the chemical properties of an atom?
The strong force holds neutrons and protons together in the nucleus. The number of electrons and protons in an atom determines its chemical properties. Chemical properties include the specific ways that atoms and molecules react and the energy that they release or use in these reactions.
What determines the chemical properties of an element quizlet?
The chemical properties of an element, are determined by the number of protons in the nucleus. This number of protons is called the atomic number. The mass of the atom, its atomic mass, depends upon the sum of the number of protons and the number of neutrons present in the nucleus.
When oxygen and hydrogen gases combine the result is quizlet?
Liquid water (H2O) is formed when two gases, hydrogen (H2) and oxygen (O2), react.
What did Robert Brown see in his microscope?
In 1827, while examining grains of pollen of the plant Clarkia pulchella suspended in water under a microscope, Brown observed minute particles, now known to be amyloplasts (starch organelles) and spherosomes (lipid organelles), ejected from the pollen grains, executing a continuous jittery motion.
What are chemical properties determined by?
An element’s unique chemical properties are determined by its number of electrons. Remember, an element’s atomic number indicates total number of protons as well as total number of electrons (in a neutral atom).
What determines the chemical and physical properties of an atom?
Electrons located in the outermost shell of the electron cloud are called “valence electrons” and have the highest energy. Valence electrons determine the chemical properties of an element, or how the valence electrons of one element are shared or traded with valence electrons of other elements to create new molecules.
What determines the chemical properties of an element?
An element can be identified by its atomic number, or the number of protons located in its nucleus. Valence electrons determine the chemical properties of an element, or how the valence electrons of one element are shared or traded with valence electrons of other elements to create new molecules.
What determines the chemical properties and chemical reactivity of an element?
The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells. Halogens are highly reactive because they readily gain an electron to fill their outermost shell.
When oxygen and hydrogen gases combine the result is?
When molecular hydrogen (H2) and oxygen (O2) are combined and allowed to react together, energy is released and the molecules of hydrogen and oxygen can combine to form either water or hydrogen peroxide. These two processes are represented by the two chemical equations shown at right.
When oxygen and hydrogen gases combine the result is group of answer choices?
water
Hydrogen molecules violently react with oxygen when the existing molecular bonds break and new bonds are formed between oxygen and hydrogen atoms. As the products of the reaction are at a lower energy level than the reactants, the result is an explosive release of energy and the production of water.
Did Robert Brown have a wife?
Nothing is known of his early life or education. On 7 May 1849 he married Helen Nicolson at Edinburgh; they were to have at least three children.
Who discovered cell?
Robert Hooke
Initially discovered by Robert Hooke in 1665, the cell has a rich and interesting history that has ultimately given way to many of today’s scientific advancements.
What are three chemical properties of matter?
There are many chemical properties of matter. In addition to toxicity, flammability , chemical stability, and oxidation states, other chemical properties include: Enthalpy of formation. The heat of combustion. Electronegativity . Coordination number. Solubility. Acidity/basicity.
What are some examples of chemical properties of matter?
Chemical properties are the characteristics that describe the composition of matter. These traits are carried by each individual atom , or part of matter. Some examples of chemical properties include combustibility, flammability and reactivity.
What are the physical and chemical properties of matter?
physical property: Any characteristic that can be determined without changing the substance’s chemical identity. chemical property: Any characteristic that can be determined only by changing a substance’s molecular structure. All properties of matter are either extensive or intensive and either physical or chemical.
Is a state of matter a physical property or chemical property?
States of matter is also a physical property since all substances can exist in a solid, liquid or gas phase depending on energy loss or gain. The same element is present after the change and throughout the process.