SCIENCE
Cards (31)
- They performed experiments with gases causing him to be convinced that matter was made up of tiny, invisible particles, and also observed that the same amounts of hydrogen and oxygen always combine to form a given amount of water. He reasoned that each element must be made of its unique kind of particle and that these particles combine in simple ways
- smallest particle of an element that has all the properties of the element.
- The size of an atom is measured in?
- It is a particle consisting two or more atoms combined in a specific arrangment
- _ takes the shape of the container because the particles can move freely to all parts of the container. The particles move freely because they are far apart, and there is a negligible attraction between them.
- In _, the particles are closer to one another, nudging one another as they move. Since the particles are closer to one another, the attraction between particles is stronger than those in gases
- _ have definite shapes and volume because the particles are packed closely together in fixed positions
- _ describes how much space an object or substance takes up (volume) in relation to the amount of matter in that object or substance (its mass). _ is the amount of mass per unit volume.
- what process is liquid to gas
- process where water vapor turns liquid
- process of solid to liquid
- process of liquid to solid
- carries a positive charge and inside the nucleus
- carries a negative charge and outside of nucleus
- does not carry any charge or is neutral and inside the nucleus
- the _ _ is the sum of the total no. of protons and neutron
- A _ is an element that shares some properties with metals and some with non-metals. These elements also are called semimetals.
- _ make up most of the elements in the periodic table.
- These are the most stable of the elements (non-reactive), which include He, Ne, Ar, Kr, Xe, and Rn. _ _ share properties like high densities, high melting points, colorless, odorless, and tasteless.
- These are the elements F, Cl, Br, I, and At. These elements are known to be salt-forming.
- These are the elements Be, Mg, Ca, Sr, Ba, and Ra. These are very reactive elements that have similar chemical behavior during the formation of molecules and compounds. Many compounds in this group are insoluble in water.
- These are the elements Li, Na, K, Rb, Cs, and Fr. They are all metals, extremely soft metals, which can be cut with a butter knife. Alkali metals are very abundant in nature. They share many similar chemical and physical properties; for example, they have low densities and low melting and boiling points.
- A _ is a row of elements in the periodic table whose properties change gradually and predictably
- The _ law states that when the elements are arranged in order of increasing atomic number, their physical and chemical properties vary periodically
- __ is the energy required to remove an electron from a neutral atom in its gaseous phase.
- ionization energy increases from
- _ can be understood as a chemical property describing an atom's ability to attract and bind with electrons.
- from _ to _ across a period of elements, electronegativity increases.
- _ _ is the ability of an atom to accept an electron. Unlike electronegativity, _ _ is a quantitative measurement of the energy change that occurs when an electron is added to a neutral gas atom. The more negative the __ value, the higher an atom's ? for electrons.
- The _ _ of a chemical element is a measure of the size of its atoms. Within each period (horizontal row), the atomic size through its radius tends to decrease with increasing atomic number (nuclear charge). The largest atom in a period is a Group IA atom, and the smallest is a noble-gas atom. Within each group (vertical column), the atomic size tends to increase with the period number.