Calcium itself is an element and is a pure substance, so it is a homogeneous material. It is not a mixture at all.
Chalk is a heterogeneous substance because it is composed of various materials such as calcium carbonate, quartz, clay, and other minerals. These materials are not uniformly distributed throughout the chalk, resulting in a non-uniform composition.
Calcium bromide, CaBr2, is a compound. It is not an element, because elements are individual species and they are found in the periodic table. It is not a homogeneous or heterogeneous mixture, because it is a single entity.
Green ink is homogeneous because it is a single phase solution where the ink molecules are evenly distributed throughout the solution.
Calcium carbonate is a pure chemical compound with the chemical formula CaCO3, making it a homogeneous substance. Homogeneous mixtures have uniform composition throughout, with the same properties and proportions of components in any given sample. In contrast, heterogeneous mixtures consist of visibly different substances that are not uniformly distributed. Calcium carbonate is commonly found in nature as limestone, marble, and chalk, but in its pure form, it is considered a homogeneous substance.
Calcium itself is an element and is a pure substance, so it is a homogeneous material. It is not a mixture at all.
Calcium is an element. It is a pure substance made up of only one type of atom. It is not a compound, homogeneous mixture, or heterogeneous mixture.
Rice grits is homogeneous, corn grits is homogeneous, rice and corn grits mixed is heterogeneous.
Heterogenous
Chalk is a heterogeneous substance because it is composed of various materials such as calcium carbonate, quartz, clay, and other minerals. These materials are not uniformly distributed throughout the chalk, resulting in a non-uniform composition.
heterogeneous
peach is heterogeneous or homogeneous?
Mixtures can be homogeneous but also heterogeneous.
If it's got pulp in it, it would be heterogeneous -- otherwise, it is homogeneous.
Heterogenous
Calcium bromide, CaBr2, is a compound. It is not an element, because elements are individual species and they are found in the periodic table. It is not a homogeneous or heterogeneous mixture, because it is a single entity.
Medicines may be homogeneous or heterogeneous.